diff --git a/.github/workflows/pr-build.yml b/.github/workflows/pr-build.yml
index 90b455e..f667c61 100644
--- a/.github/workflows/pr-build.yml
+++ b/.github/workflows/pr-build.yml
@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        java: [11, 8]
+        java: [15]
 
     steps:
     - uses: actions/checkout@v2
diff --git a/.github/workflows/push-build.yml b/.github/workflows/push-build.yml
index 819319d..f08c7b3 100644
--- a/.github/workflows/push-build.yml
+++ b/.github/workflows/push-build.yml
@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        java: [11, 8]
+        java: [15]
 
     steps:
     - uses: actions/checkout@v2