diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5cc403f9b..da7293c98 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,9 +15,9 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest]
         jdk: [11]
-        include:
-          - os: ubuntu-latest
-            jdk: 21
+#        include:
+#          - os: ubuntu-latest
+#            jdk: 21
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/cache@v2