diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 7b80d46..97a6547 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [ "main" ]
 
+permissions:
+  contents: read
+
 env:
   CARGO_TERM_COLOR: always