diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9f4bb28..b6b0942 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,9 @@ on:
     branches: [main]
   pull_request:
 
+permissions:
+  contents: read
+
 env:
   CARGO_TERM_COLOR: always
   RUSTFLAGS: "-D warnings"