diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d7e0129..c18eb4f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,9 @@ on:
   pull_request:
     branches: [ "main" ]
 
+permissions:
+  contents: read
+
 jobs:
   build-and-test:
     name: Build & Test (${{ matrix.os }})