diff --git a/.travis.yml b/.travis.yml
index 279bfae3..b252528f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,15 +10,6 @@ cache:
 
 matrix:
   include:
-    - php: 5.3
-      dist: precise
-    - php: 5.4
-      dist: trusty
-    - php: 5.5
-      dist: trusty
-    - php: 5.6
-    - php: 7.0
-    - php: 7.1
     - php: 7.2
     - php: 7.3
       env:
diff --git a/composer.json b/composer.json
index 34350b29..3b5a1863 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
         }
     ],
     "require": {
-        "php": "^5.3.3 || ^7.0",
+        "php": "^7.2",
         "symfony/polyfill-ctype": "^1.8"
     },
     "require-dev": {