diff --git a/.github/workflows/shellcheck.yml b/.github/workflows/shellcheck.yml
index c005179..9a85b80 100644
--- a/.github/workflows/shellcheck.yml
+++ b/.github/workflows/shellcheck.yml
@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [ "main" ]
 
+permissions:
+  contents: read
+
 jobs:
   shellcheck:
     name: Run ShellCheck