diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index 56fba7f..0583907 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -1,5 +1,8 @@
 name: C/C++ CI
 
+permissions:
+  contents: read
+
 on:
   push:
     branches: [ "master" ]