diff --git a/.circleci/Dockerfile-openjdk7 b/.circleci/Dockerfile-openjdk7
deleted file mode 100644
index aab0800d..00000000
--- a/.circleci/Dockerfile-openjdk7
+++ /dev/null
@@ -1,3 +0,0 @@
-FROM openjdk:7-jdk
-
-RUN apt update && apt install -y maven
diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index fbe8249b..00000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,91 +0,0 @@
-version: 2.1
-
-orbs:
-  win: circleci/windows@2.4.1
-
-commands:
-  create_custom_cache_lock:
-    description: "Create custom cache lock for java version."
-    parameters:
-      filename:
-        type: string
-    steps:
-      - run:
-          name: Grab java version and dump to file
-          command: java -version > << parameters.filename >>
-
-default_steps: &default_steps
-  steps:
-    - checkout
-
-    - run: |
-        mvn clean install
-    - run: cd dogstatsd-http-core && mvn clean install
-
-jobs:
-  openjdk7:
-    docker:
-      - image: jfullaondo/openjdk:7
-    <<: *default_steps
-  openjdk8:
-    docker: &jdk8
-      - image: cimg/openjdk:8.0
-    <<: *default_steps
-  openjdk11:
-    docker:
-      - image: cimg/openjdk:11.0
-    <<: *default_steps
-  openjdk13:
-    docker:
-      - image: cimg/openjdk:13.0
-    <<: *default_steps
-  openjdk17:
-    docker:
-      - image: cimg/openjdk:17.0
-    <<: *default_steps
-
-## Fails with "Source option 7 is no longer supported. Use 8 or later."
-#  openjdk21:
-#    docker:
-#      - image: cimg/openjdk:21.0
-#    <<: *default_steps
-
-  windows-openjdk12:
-    executor:
-      # https://github.com/CircleCI-Public/windows-orb/blob/v2.4.1/src/executors/default.yml
-      name: win/default
-      # https://circleci.com/developer/machine/image/windows-server-2019
-      version: 2023.04.1
-    steps:
-      - checkout
-      - run: java -version
-      - run: |
-          choco install maven
-      - run: |
-          mvn clean install
-
-  openjdk8-jnr-exclude:
-    docker: *jdk8
-    steps:
-      - checkout
-      - run: "mvn -Pjnr-exclude clean test"
-  openjdk8-jnr-latest:
-     docker: *jdk8
-     steps:
-       - checkout
-       - run: "mvn clean test -DskipTests" # build main and test with default deps
-       - run: "mvn -Pjnr-latest test"      # run with modified deps
-
-workflows:
-  version: 2
-  agent-tests:
-    jobs:
-      - openjdk7
-      - openjdk8
-      - openjdk11
-      - openjdk13
-      - openjdk17
-#      - openjdk21
-      - windows-openjdk12
-      - openjdk8-jnr-exclude
-      - openjdk8-jnr-latest
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..ea450137
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,58 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    name: Test (Java ${{ matrix.java-version }}, ${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        java-version: ['9', '11', '13', '17']
+        include:
+          - os: windows-latest
+            java-version: '12'
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
+        with:
+          java-version: ${{ matrix.java-version }}
+          distribution: zulu
+          cache: maven
+      - name: Build and test
+        run: mvn clean install
+      - name: Build and test dogstatsd-http-core
+        run: mvn clean install
+        working-directory: dogstatsd-http-core
+
+  test-jnr-exclude:
+    name: Test (Java 9, jnr-exclude)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
+        with:
+          java-version: '9'
+          distribution: zulu
+          cache: maven
+      - name: Build and test (jnr-exclude)
+        run: mvn clean test -P jnr-exclude
+
+  test-jnr-latest:
+    name: Test (Java 9, jnr-latest)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
+        with:
+          java-version: '9'
+          distribution: zulu
+          cache: maven
+      - name: Build with default dependencies
+        run: mvn clean install
+      - name: Test with latest jnr dependencies
+        run: mvn test -P jnr-latest
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8672764c..437f07f7 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -17,7 +17,7 @@ deploy_to_sonatype:
   tags:
     - "docker-in-docker:amd64"
 
-  image: maven:3.9-eclipse-temurin-8
+  image: maven:3.9-eclipse-temurin-17
 
   script:
     # Ensure we don't print commands being run to the logs during credential
diff --git a/pom.xml b/pom.xml
index fbea7216..60b136f5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -347,7 +347,7 @@
                         <configuration>
                             <rules>
                                 <requireJavaVersion>
-                                    <version>[1.7.0-0,1.9.0-0),[9.0,18.0-0)</version>
+                                    <version>[9.0,18.0-0)</version>
                                 </requireJavaVersion>
                             </rules>
                         </configuration>
@@ -372,8 +372,7 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
-                    <source>1.7</source>
-                    <target>1.7</target>
+                    <release>7</release>
                 </configuration>
             </plugin>
             <plugin>