diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index e6f799a..ce76e10 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -7,6 +7,9 @@ on:
     branches: [ "master" ]
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 env:
   CARGO_TERM_COLOR: always