diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5297114a2a..9c320452ff 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,6 +13,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   test:
     name: "JDK ${{ matrix.java }}"