diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index da38ef8..a9ac1e7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,10 +14,10 @@ jobs:
     if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.event.pull_request.base.repo.full_name
     steps:
       - uses: actions/checkout@v2
-      - name: Set up JDK 25
+      - name: Set up JDK 17
         uses: actions/setup-java@v2
         with:
-          java-version: '25'
+          java-version: '17'
           distribution: 'temurin'
       - name: Build with Maven
         run: ./mvnw --batch-mode clean verify
diff --git a/pom.xml b/pom.xml
index 97e23ea..3427000 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,7 +28,7 @@
     <jgit.version>5.13.1.202206130422-r</jgit.version>
     <jacoco.version>0.8.13</jacoco.version>
     <takari-plugin-testing.version>3.1.1</takari-plugin-testing.version>
-    <google-java-format.version>1.35.0</google-java-format.version>
+    <google-java-format.version>1.28.0</google-java-format.version>
   </properties>
 
   <modules>