diff --git a/.github/workflows/split.yaml b/.github/workflows/split.yaml
index 46882b656..4e1ef9f3b 100644
--- a/.github/workflows/split.yaml
+++ b/.github/workflows/split.yaml
@@ -8,6 +8,9 @@ on:
         required: false
         default: ''
 
+permissions:
+  contents: read
+
 jobs:
   split:
     name: Split on branch ${{ github.ref }}