diff --git a/docs/plugins.md b/docs/plugins.md
index 213c83999219..2b46257e3985 100644
--- a/docs/plugins.md
+++ b/docs/plugins.md
@@ -51,7 +51,7 @@ To include in your project, add the following to `build.gradle`:
 buildscript {
   repositories {
     mavenLocal()
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
   }
   dependencies {
     classpath "org.openapitools:openapi-generator-gradle-plugin:3.3.4"
@@ -96,4 +96,4 @@ openApiGenerate {
         dateLibrary: "java8"
     ]
 }
-```
\ No newline at end of file
+```
diff --git a/modules/openapi-generator-gradle-plugin/README.adoc b/modules/openapi-generator-gradle-plugin/README.adoc
index 88ef8a1f5eda..0f97dfb55108 100644
--- a/modules/openapi-generator-gradle-plugin/README.adoc
+++ b/modules/openapi-generator-gradle-plugin/README.adoc
@@ -56,7 +56,7 @@ Using https://docs.gradle.org/current/userguide/plugins.html#sec:old_plugin_appl
 buildscript {
   repositories {
     mavenLocal()
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
     // or, via Gradle Plugin Portal:
     // url "https://plugins.gradle.org/m2/"
   }
diff --git a/modules/openapi-generator-gradle-plugin/build.gradle b/modules/openapi-generator-gradle-plugin/build.gradle
index 8dd9dfa068f9..d6886b217568 100644
--- a/modules/openapi-generator-gradle-plugin/build.gradle
+++ b/modules/openapi-generator-gradle-plugin/build.gradle
@@ -2,7 +2,7 @@ buildscript {
     ext.kotlin_version = '1.3.20'
     repositories {
         mavenLocal()
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         maven {
             url "https://plugins.gradle.org/m2/"
         }
@@ -46,7 +46,7 @@ targetCompatibility = 1.8
 
 repositories {
     jcenter()
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
     mavenLocal()
     maven {
         url "https://oss.sonatype.org/content/repositories/releases/"
diff --git a/modules/openapi-generator-gradle-plugin/samples/local-spec/build.gradle b/modules/openapi-generator-gradle-plugin/samples/local-spec/build.gradle
index 6241891c6059..70d810a83cb5 100644
--- a/modules/openapi-generator-gradle-plugin/samples/local-spec/build.gradle
+++ b/modules/openapi-generator-gradle-plugin/samples/local-spec/build.gradle
@@ -1,7 +1,7 @@
 buildscript {
     repositories {
         mavenLocal()
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         maven {
             url "https://plugins.gradle.org/m2/"
         }
diff --git a/modules/openapi-generator/src/main/resources/Groovy/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Groovy/build.gradle.mustache
index 969998fd670a..915c6ab04bed 100644
--- a/modules/openapi-generator/src/main/resources/Groovy/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Groovy/build.gradle.mustache
@@ -14,7 +14,7 @@ wrapper {
 buildscript {
     repositories {
         maven { url "https://repo1.maven.org/maven2" }
-        maven { url 'https://repo.jfrog.org/artifactory/gradle-plugins' }
+        maven { url = 'https://repo.jfrog.org/artifactory/gradle-plugins' }
     }
     dependencies {
         classpath(group: 'org.jfrog.buildinfo', name: 'build-info-extractor-gradle', version: '2.0.16')
@@ -22,7 +22,7 @@ buildscript {
 }
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
     mavenLocal()
 }
 
diff --git a/modules/openapi-generator/src/main/resources/Java/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/build.gradle.mustache
index abfb8653beca..69707eadc166 100644
--- a/modules/openapi-generator/src/main/resources/Java/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/build.gradle.mustache
@@ -6,7 +6,7 @@ version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
@@ -16,7 +16,7 @@ buildscript {
 }
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
     jcenter()
 }
 
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/feign/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/feign/build.gradle.mustache
index cd78d9e03d30..69170a031771 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/feign/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/feign/build.gradle.mustache
@@ -6,7 +6,7 @@ version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/build.gradle.mustache
index e190e36cdaa6..0089f90de782 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/build.gradle.mustache
@@ -6,7 +6,7 @@ version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/build.gradle.mustache
index 5a162a7d7106..30aa47428cb5 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/build.gradle.mustache
@@ -6,7 +6,7 @@ version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/native/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/native/build.gradle.mustache
index a92d040f6237..cea6681a95e0 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/native/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/native/build.gradle.mustache
@@ -6,13 +6,13 @@ version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
 }
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
     jcenter()
 }
 
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/build.gradle.mustache
index 67f7a7cda4a5..304b00a445a7 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/build.gradle.mustache
@@ -9,7 +9,7 @@ version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/rest-assured/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/rest-assured/build.gradle.mustache
index 0caef5e4aa75..b04e53f1e966 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/rest-assured/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/rest-assured/build.gradle.mustache
@@ -6,7 +6,7 @@ version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/build.gradle.mustache
index 5f716aad842c..59a0970f3582 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/build.gradle.mustache
@@ -6,7 +6,7 @@ version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/build.gradle.mustache
index 610d25d1473b..33d09ae83054 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/build.gradle.mustache
@@ -6,7 +6,7 @@ version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/retrofit/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/retrofit/build.gradle.mustache
index 7431d90eba3b..fab2f0d9fe24 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/retrofit/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/retrofit/build.gradle.mustache
@@ -6,7 +6,7 @@ version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache
index 813886e4b560..ea96f0941652 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache
@@ -6,7 +6,7 @@ version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/vertx/build.gradle.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/vertx/build.gradle.mustache
index e135bc2212af..53bc7b9a8e59 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/vertx/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/vertx/build.gradle.mustache
@@ -5,7 +5,7 @@ group = '{{groupId}}'
 version = '{{artifactVersion}}'
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
     jcenter()
 }
 
diff --git a/modules/openapi-generator/src/main/resources/JavaJaxRS/resteasy/eap/gradle.mustache b/modules/openapi-generator/src/main/resources/JavaJaxRS/resteasy/eap/gradle.mustache
index 98e22a8af1e1..b1f08021b4ec 100644
--- a/modules/openapi-generator/src/main/resources/JavaJaxRS/resteasy/eap/gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/JavaJaxRS/resteasy/eap/gradle.mustache
@@ -4,7 +4,7 @@ project.version = "{{artifactVersion}}"
 project.group = "{{groupId}}"
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 dependencies {
diff --git a/modules/openapi-generator/src/main/resources/JavaJaxRS/resteasy/gradle.mustache b/modules/openapi-generator/src/main/resources/JavaJaxRS/resteasy/gradle.mustache
index 924376cb70d9..6427c11001bc 100644
--- a/modules/openapi-generator/src/main/resources/JavaJaxRS/resteasy/gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/JavaJaxRS/resteasy/gradle.mustache
@@ -4,7 +4,7 @@ project.version = "{{artifactVersion}}"
 project.group = "{{groupId}}"
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 dependencies {
diff --git a/modules/openapi-generator/src/main/resources/android/build.mustache b/modules/openapi-generator/src/main/resources/android/build.mustache
index ea6766fa0539..c26f9b8967d9 100644
--- a/modules/openapi-generator/src/main/resources/android/build.mustache
+++ b/modules/openapi-generator/src/main/resources/android/build.mustache
@@ -5,7 +5,7 @@ project.version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/modules/openapi-generator/src/main/resources/android/libraries/volley/build.mustache b/modules/openapi-generator/src/main/resources/android/libraries/volley/build.mustache
index f608fe18f737..7c6cb04c856e 100644
--- a/modules/openapi-generator/src/main/resources/android/libraries/volley/build.mustache
+++ b/modules/openapi-generator/src/main/resources/android/libraries/volley/build.mustache
@@ -5,7 +5,7 @@ project.version = '{{artifactVersion}}'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/modules/openapi-generator/src/main/resources/kotlin-client/build.gradle.mustache b/modules/openapi-generator/src/main/resources/kotlin-client/build.gradle.mustache
index 2e809addf425..765ba75fbe91 100644
--- a/modules/openapi-generator/src/main/resources/kotlin-client/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/kotlin-client/build.gradle.mustache
@@ -13,7 +13,7 @@ buildscript {
     {{/jvm-retrofit2}}
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
@@ -26,7 +26,7 @@ apply plugin: 'kotlin-kapt'
 {{/moshiCodeGen}}
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 test {
diff --git a/modules/openapi-generator/src/main/resources/kotlin-server/libraries/ktor/build.gradle.mustache b/modules/openapi-generator/src/main/resources/kotlin-server/libraries/ktor/build.gradle.mustache
index 4f97738c3d84..08c317ea6669 100644
--- a/modules/openapi-generator/src/main/resources/kotlin-server/libraries/ktor/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/kotlin-server/libraries/ktor/build.gradle.mustache
@@ -12,9 +12,9 @@ buildscript {
     ext.shadow_version = '2.0.3'
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         maven {
-            url "https://plugins.gradle.org/m2/"
+            url = "https://plugins.gradle.org/m2/"
         }
     }
     dependencies {
@@ -50,8 +50,8 @@ shadowJar {
 }
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
-    maven { url  "https://dl.bintray.com/kotlin/ktor" }
+    maven { url "https://repo1.maven.org/maven2" }
+    maven { url "https://dl.bintray.com/kotlin/ktor" }
     maven { url "https://dl.bintray.com/kotlin/kotlinx" }
 }
 
diff --git a/modules/openapi-generator/src/main/resources/scala-gatling/build.gradle b/modules/openapi-generator/src/main/resources/scala-gatling/build.gradle
index d4862902bcd4..a9a3eb68dadf 100644
--- a/modules/openapi-generator/src/main/resources/scala-gatling/build.gradle
+++ b/modules/openapi-generator/src/main/resources/scala-gatling/build.gradle
@@ -3,7 +3,7 @@ plugins {
 }
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 dependencies {
diff --git a/modules/openapi-generator/src/main/resources/scala-httpclient/build.gradle.mustache b/modules/openapi-generator/src/main/resources/scala-httpclient/build.gradle.mustache
index 32e77db6231f..f65046daa62a 100644
--- a/modules/openapi-generator/src/main/resources/scala-httpclient/build.gradle.mustache
+++ b/modules/openapi-generator/src/main/resources/scala-httpclient/build.gradle.mustache
@@ -109,7 +109,7 @@ ext {
 
 repositories {
     mavenLocal()
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 dependencies {
diff --git a/samples/client/petstore/groovy/build.gradle b/samples/client/petstore/groovy/build.gradle
index 9698f14c2ab2..a97fc77b8130 100644
--- a/samples/client/petstore/groovy/build.gradle
+++ b/samples/client/petstore/groovy/build.gradle
@@ -14,7 +14,7 @@ wrapper {
 buildscript {
     repositories {
         maven { url "https://repo1.maven.org/maven2" }
-        maven { url 'https://repo.jfrog.org/artifactory/gradle-plugins' }
+        maven { url = 'https://repo.jfrog.org/artifactory/gradle-plugins' }
     }
     dependencies {
         classpath(group: 'org.jfrog.buildinfo', name: 'build-info-extractor-gradle', version: '2.0.16')
@@ -22,7 +22,7 @@ buildscript {
 }
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
     mavenLocal()
 }
 
diff --git a/samples/client/petstore/java/feign/build.gradle b/samples/client/petstore/java/feign/build.gradle
index fe911616a9ca..0429acb2f2b9 100644
--- a/samples/client/petstore/java/feign/build.gradle
+++ b/samples/client/petstore/java/feign/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/feign10x/build.gradle b/samples/client/petstore/java/feign10x/build.gradle
index 2947fa9fca9b..e859b17d6f99 100644
--- a/samples/client/petstore/java/feign10x/build.gradle
+++ b/samples/client/petstore/java/feign10x/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/google-api-client/build.gradle b/samples/client/petstore/java/google-api-client/build.gradle
index d708ed36873b..520cf4df273c 100644
--- a/samples/client/petstore/java/google-api-client/build.gradle
+++ b/samples/client/petstore/java/google-api-client/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/jersey1/build.gradle b/samples/client/petstore/java/jersey1/build.gradle
index f443c5f9b0bd..e2d9463cf37c 100644
--- a/samples/client/petstore/java/jersey1/build.gradle
+++ b/samples/client/petstore/java/jersey1/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
@@ -16,7 +16,7 @@ buildscript {
 }
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
     jcenter()
 }
 
diff --git a/samples/client/petstore/java/jersey2-java8/build.gradle b/samples/client/petstore/java/jersey2-java8/build.gradle
index dce5fd6f9f4c..75ba6b7c88d3 100644
--- a/samples/client/petstore/java/jersey2-java8/build.gradle
+++ b/samples/client/petstore/java/jersey2-java8/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/jersey2/build.gradle b/samples/client/petstore/java/jersey2/build.gradle
index 7d37027e24fd..1f7b5409598e 100644
--- a/samples/client/petstore/java/jersey2/build.gradle
+++ b/samples/client/petstore/java/jersey2/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/native/build.gradle b/samples/client/petstore/java/native/build.gradle
index 3eb0149b872f..a790b04b52b9 100644
--- a/samples/client/petstore/java/native/build.gradle
+++ b/samples/client/petstore/java/native/build.gradle
@@ -6,13 +6,13 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
 }
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
     jcenter()
 }
 
diff --git a/samples/client/petstore/java/okhttp-gson-parcelableModel/build.gradle b/samples/client/petstore/java/okhttp-gson-parcelableModel/build.gradle
index 372a3e016961..39f391d1ca8c 100644
--- a/samples/client/petstore/java/okhttp-gson-parcelableModel/build.gradle
+++ b/samples/client/petstore/java/okhttp-gson-parcelableModel/build.gradle
@@ -7,7 +7,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/okhttp-gson/build.gradle b/samples/client/petstore/java/okhttp-gson/build.gradle
index 1228e8e4746b..86d58b600385 100644
--- a/samples/client/petstore/java/okhttp-gson/build.gradle
+++ b/samples/client/petstore/java/okhttp-gson/build.gradle
@@ -7,7 +7,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/rest-assured/build.gradle b/samples/client/petstore/java/rest-assured/build.gradle
index 926a6da124a5..67c6d784de84 100644
--- a/samples/client/petstore/java/rest-assured/build.gradle
+++ b/samples/client/petstore/java/rest-assured/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/resteasy/build.gradle b/samples/client/petstore/java/resteasy/build.gradle
index 8458f287098e..1155ae1cd21b 100644
--- a/samples/client/petstore/java/resteasy/build.gradle
+++ b/samples/client/petstore/java/resteasy/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/resttemplate-withXml/build.gradle b/samples/client/petstore/java/resttemplate-withXml/build.gradle
index 948c75cd2d01..ca80535884a3 100644
--- a/samples/client/petstore/java/resttemplate-withXml/build.gradle
+++ b/samples/client/petstore/java/resttemplate-withXml/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/resttemplate/build.gradle b/samples/client/petstore/java/resttemplate/build.gradle
index 3c4f5135550b..02d5b8477fac 100644
--- a/samples/client/petstore/java/resttemplate/build.gradle
+++ b/samples/client/petstore/java/resttemplate/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/retrofit/build.gradle b/samples/client/petstore/java/retrofit/build.gradle
index 8adb1c97e406..606905649a1f 100644
--- a/samples/client/petstore/java/retrofit/build.gradle
+++ b/samples/client/petstore/java/retrofit/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/retrofit2-play24/build.gradle b/samples/client/petstore/java/retrofit2-play24/build.gradle
index 0154e4ac5a1b..c40aba2faad6 100644
--- a/samples/client/petstore/java/retrofit2-play24/build.gradle
+++ b/samples/client/petstore/java/retrofit2-play24/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/retrofit2-play25/build.gradle b/samples/client/petstore/java/retrofit2-play25/build.gradle
index 5ab96734c228..9bb38877b646 100644
--- a/samples/client/petstore/java/retrofit2-play25/build.gradle
+++ b/samples/client/petstore/java/retrofit2-play25/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/retrofit2-play26/build.gradle b/samples/client/petstore/java/retrofit2-play26/build.gradle
index 150b921dc0c4..c09036515951 100644
--- a/samples/client/petstore/java/retrofit2-play26/build.gradle
+++ b/samples/client/petstore/java/retrofit2-play26/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/retrofit2/build.gradle b/samples/client/petstore/java/retrofit2/build.gradle
index 8d6f396a7d62..3b1a970bd1e5 100644
--- a/samples/client/petstore/java/retrofit2/build.gradle
+++ b/samples/client/petstore/java/retrofit2/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/retrofit2rx/build.gradle b/samples/client/petstore/java/retrofit2rx/build.gradle
index ec0b933d544a..5b8f85066e0c 100644
--- a/samples/client/petstore/java/retrofit2rx/build.gradle
+++ b/samples/client/petstore/java/retrofit2rx/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/retrofit2rx2/build.gradle b/samples/client/petstore/java/retrofit2rx2/build.gradle
index ece899b42a2a..dbb70bc02767 100644
--- a/samples/client/petstore/java/retrofit2rx2/build.gradle
+++ b/samples/client/petstore/java/retrofit2rx2/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
diff --git a/samples/client/petstore/java/vertx/build.gradle b/samples/client/petstore/java/vertx/build.gradle
index f0f0aa166ab4..d62c637c2440 100644
--- a/samples/client/petstore/java/vertx/build.gradle
+++ b/samples/client/petstore/java/vertx/build.gradle
@@ -5,7 +5,7 @@ group = 'org.openapitools'
 version = '1.0.0'
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
     jcenter()
 }
 
diff --git a/samples/client/petstore/java/webclient/build.gradle b/samples/client/petstore/java/webclient/build.gradle
index 2b086c3761de..ef4781d09292 100644
--- a/samples/client/petstore/java/webclient/build.gradle
+++ b/samples/client/petstore/java/webclient/build.gradle
@@ -6,7 +6,7 @@ version = '1.0.0'
 
 buildscript {
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         jcenter()
     }
     dependencies {
@@ -16,7 +16,7 @@ buildscript {
 }
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
     jcenter()
 }
 
diff --git a/samples/client/petstore/kotlin-gson/build.gradle b/samples/client/petstore/kotlin-gson/build.gradle
index 95954baaf8cf..b47c93982424 100644
--- a/samples/client/petstore/kotlin-gson/build.gradle
+++ b/samples/client/petstore/kotlin-gson/build.gradle
@@ -10,7 +10,7 @@ buildscript {
     ext.kotlin_version = '1.3.61'
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
@@ -20,7 +20,7 @@ buildscript {
 apply plugin: 'kotlin'
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 test {
diff --git a/samples/client/petstore/kotlin-json-request-date/build.gradle b/samples/client/petstore/kotlin-json-request-date/build.gradle
index f5b086056ff3..56be0bd0dd87 100644
--- a/samples/client/petstore/kotlin-json-request-date/build.gradle
+++ b/samples/client/petstore/kotlin-json-request-date/build.gradle
@@ -10,7 +10,7 @@ buildscript {
     ext.kotlin_version = '1.3.61'
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
@@ -20,7 +20,7 @@ buildscript {
 apply plugin: 'kotlin'
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 test {
diff --git a/samples/client/petstore/kotlin-moshi-codegen/build.gradle b/samples/client/petstore/kotlin-moshi-codegen/build.gradle
index f887698882ec..3790ead27946 100644
--- a/samples/client/petstore/kotlin-moshi-codegen/build.gradle
+++ b/samples/client/petstore/kotlin-moshi-codegen/build.gradle
@@ -10,7 +10,7 @@ buildscript {
     ext.kotlin_version = '1.3.61'
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
@@ -21,7 +21,7 @@ apply plugin: 'kotlin'
 apply plugin: 'kotlin-kapt'
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 test {
diff --git a/samples/client/petstore/kotlin-nonpublic/build.gradle b/samples/client/petstore/kotlin-nonpublic/build.gradle
index f5b086056ff3..56be0bd0dd87 100644
--- a/samples/client/petstore/kotlin-nonpublic/build.gradle
+++ b/samples/client/petstore/kotlin-nonpublic/build.gradle
@@ -10,7 +10,7 @@ buildscript {
     ext.kotlin_version = '1.3.61'
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
@@ -20,7 +20,7 @@ buildscript {
 apply plugin: 'kotlin'
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 test {
diff --git a/samples/client/petstore/kotlin-nullable/build.gradle b/samples/client/petstore/kotlin-nullable/build.gradle
index f5b086056ff3..56be0bd0dd87 100644
--- a/samples/client/petstore/kotlin-nullable/build.gradle
+++ b/samples/client/petstore/kotlin-nullable/build.gradle
@@ -10,7 +10,7 @@ buildscript {
     ext.kotlin_version = '1.3.61'
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
@@ -20,7 +20,7 @@ buildscript {
 apply plugin: 'kotlin'
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 test {
diff --git a/samples/client/petstore/kotlin-okhttp3/build.gradle b/samples/client/petstore/kotlin-okhttp3/build.gradle
index 555fa1a75a76..662c2a62ce34 100644
--- a/samples/client/petstore/kotlin-okhttp3/build.gradle
+++ b/samples/client/petstore/kotlin-okhttp3/build.gradle
@@ -10,7 +10,7 @@ buildscript {
     ext.kotlin_version = '1.3.61'
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
@@ -20,7 +20,7 @@ buildscript {
 apply plugin: 'kotlin'
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 test {
diff --git a/samples/client/petstore/kotlin-retrofit2/build.gradle b/samples/client/petstore/kotlin-retrofit2/build.gradle
index a333a51cb021..392d9a352e68 100644
--- a/samples/client/petstore/kotlin-retrofit2/build.gradle
+++ b/samples/client/petstore/kotlin-retrofit2/build.gradle
@@ -11,7 +11,7 @@ buildscript {
     ext.retrofitVersion = '2.6.2'
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
@@ -21,7 +21,7 @@ buildscript {
 apply plugin: 'kotlin'
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 test {
diff --git a/samples/client/petstore/kotlin-string/build.gradle b/samples/client/petstore/kotlin-string/build.gradle
index f5b086056ff3..56be0bd0dd87 100644
--- a/samples/client/petstore/kotlin-string/build.gradle
+++ b/samples/client/petstore/kotlin-string/build.gradle
@@ -10,7 +10,7 @@ buildscript {
     ext.kotlin_version = '1.3.61'
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
@@ -20,7 +20,7 @@ buildscript {
 apply plugin: 'kotlin'
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 test {
diff --git a/samples/client/petstore/kotlin-threetenbp/build.gradle b/samples/client/petstore/kotlin-threetenbp/build.gradle
index cf6de4c037ed..886101b0fbef 100644
--- a/samples/client/petstore/kotlin-threetenbp/build.gradle
+++ b/samples/client/petstore/kotlin-threetenbp/build.gradle
@@ -10,7 +10,7 @@ buildscript {
     ext.kotlin_version = '1.3.61'
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
@@ -20,7 +20,7 @@ buildscript {
 apply plugin: 'kotlin'
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 test {
diff --git a/samples/client/petstore/kotlin/build.gradle b/samples/client/petstore/kotlin/build.gradle
index f5b086056ff3..56be0bd0dd87 100644
--- a/samples/client/petstore/kotlin/build.gradle
+++ b/samples/client/petstore/kotlin/build.gradle
@@ -10,7 +10,7 @@ buildscript {
     ext.kotlin_version = '1.3.61'
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
     }
     dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
@@ -20,7 +20,7 @@ buildscript {
 apply plugin: 'kotlin'
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 test {
diff --git a/samples/server/petstore/jaxrs-resteasy/eap-java8/build.gradle b/samples/server/petstore/jaxrs-resteasy/eap-java8/build.gradle
index bc16c9424f1b..6498d44c2e8e 100644
--- a/samples/server/petstore/jaxrs-resteasy/eap-java8/build.gradle
+++ b/samples/server/petstore/jaxrs-resteasy/eap-java8/build.gradle
@@ -4,7 +4,7 @@ project.version = "1.0.0"
 project.group = "org.openapitools"
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 dependencies {
diff --git a/samples/server/petstore/jaxrs-resteasy/eap-joda/build.gradle b/samples/server/petstore/jaxrs-resteasy/eap-joda/build.gradle
index 1a4dcb70cee3..8e189f8148ce 100644
--- a/samples/server/petstore/jaxrs-resteasy/eap-joda/build.gradle
+++ b/samples/server/petstore/jaxrs-resteasy/eap-joda/build.gradle
@@ -4,7 +4,7 @@ project.version = "1.0.0"
 project.group = "org.openapitools"
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 dependencies {
diff --git a/samples/server/petstore/jaxrs-resteasy/eap/build.gradle b/samples/server/petstore/jaxrs-resteasy/eap/build.gradle
index 1a4dcb70cee3..8e189f8148ce 100644
--- a/samples/server/petstore/jaxrs-resteasy/eap/build.gradle
+++ b/samples/server/petstore/jaxrs-resteasy/eap/build.gradle
@@ -4,7 +4,7 @@ project.version = "1.0.0"
 project.group = "org.openapitools"
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
+    maven { url "https://repo1.maven.org/maven2" }
 }
 
 dependencies {
diff --git a/samples/server/petstore/kotlin-server/ktor/build.gradle b/samples/server/petstore/kotlin-server/ktor/build.gradle
index f595575e6f91..25536d4e5316 100644
--- a/samples/server/petstore/kotlin-server/ktor/build.gradle
+++ b/samples/server/petstore/kotlin-server/ktor/build.gradle
@@ -12,9 +12,9 @@ buildscript {
     ext.shadow_version = '2.0.3'
 
     repositories {
-        maven { url = "https://repo1.maven.org/maven2" }
+        maven { url "https://repo1.maven.org/maven2" }
         maven {
-            url "https://plugins.gradle.org/m2/"
+            url = "https://plugins.gradle.org/m2/"
         }
     }
     dependencies {
@@ -50,8 +50,8 @@ shadowJar {
 }
 
 repositories {
-    maven { url = "https://repo1.maven.org/maven2" }
-    maven { url  "https://dl.bintray.com/kotlin/ktor" }
+    maven { url "https://repo1.maven.org/maven2" }
+    maven { url "https://dl.bintray.com/kotlin/ktor" }
     maven { url "https://dl.bintray.com/kotlin/kotlinx" }
 }