diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 11ad89313..8f02d7be8 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -35,7 +35,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        java: [11, 20]
+        java: [11, 21]
         include:
           - os: ubuntu-latest
             java: 17
@@ -62,7 +62,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        java: [11, 20]
+        java: [11, 21]
         include:
           - os: ubuntu-latest
             java: 17