diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6ee7b4e..5337b93 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,9 @@ on:
   workflow_dispatch:
   workflow_call:
 
+permissions:
+  contents: read
+
 env:
   PYTHON_VERSION: "3.12"