diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 05539a9..df6e176 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -13,6 +13,11 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'adopt'
+          java-version: '11'
+
       - run: brew style *.rb
 
       - name: install rdflint