diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 7c89ef4..148680d 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -1,16 +1,21 @@
 name: Maven Test
 
-on: [push, pull_request]
+on: [push]
 
 jobs:
   build:
-    runs-on: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        java_version: [11, 13]
+        os: [ubuntu-latest, windows-latest]
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up JDK 11
-      uses: actions/setup-java@v1.3.0
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Setup Java JDK
+      uses: actions/setup-java@v1
       with:
-        java-version: 11
+        java-version: ${{ matrix.java_version }}
     - name: Build with Maven
       run: mvn -B package --file pom.xml