diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 395f6f7..10bc6b8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,6 +10,9 @@ on:
     branches:
       - main
 
+permissions:
+  contents: read
+
 env:
   APP_NAME: cdisc-proxy
   RUST_VERSION: stable