diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 388a1b5..f4a4168 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -16,11 +16,11 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v3
-      - name: Set up JDK 17
-        uses: actions/setup-java@v3
+      - uses: actions/checkout@v4
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
       - name: Prepare gradle.properties
         run: |