diff --git a/.github/workflows/GnuTests.yml b/.github/workflows/GnuTests.yml
index 2820c8eae..b36a97cac 100644
--- a/.github/workflows/GnuTests.yml
+++ b/.github/workflows/GnuTests.yml
@@ -6,6 +6,9 @@ name: GnuTests
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   gnu:
     permissions: