diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a819607..8875d6f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,6 +14,9 @@ jobs:
   test:
     runs-on: ${{ matrix.os }}
 
+    permissions:
+      contents: read
+
     strategy:
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]