diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2c21f1d..45a43d9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,20 +4,20 @@
 # against bad commits.
 
 name: build
-on: [ pull_request, push ]
+on: [pull_request, push]
 
 jobs:
   build:
     runs-on: ubuntu-24.04
     steps:
       - name: checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: validate gradle wrapper
-        uses: gradle/actions/wrapper-validation@v4
+        uses: gradle/actions/wrapper-validation@v6
       - name: setup jdk
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
-          java-version: '21'
+          java-version: '25'
           distribution: 'microsoft'
       - name: make gradle wrapper executable
         run: chmod +x ./gradlew