diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3fe7b5d..06d98c5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,6 +11,7 @@ on:
 
 env:
   GRADLE_VERSION: 8.5
+  JAVA_VERSION: 21
 
 jobs:
   build-natives:
@@ -41,7 +42,7 @@ jobs:
       - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: 17
+          java-version: ${{ env.JAVA_VERSION }}
       - name: Install bison
         if: ${{ matrix.os == 'windows-latest' }}
         shell: pwsh
@@ -174,7 +175,7 @@ jobs:
       - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: 17
+          java-version: ${{ env.JAVA_VERSION }}
       - name: Fetch the Ghidra dependencies.
         uses: eskatos/gradle-command-action@v3
         with: