diff --git a/.github/workflows/auto-milestone.yml b/.github/workflows/auto-milestone.yml
index 7b38cb0b01d..0697888fba0 100644
--- a/.github/workflows/auto-milestone.yml
+++ b/.github/workflows/auto-milestone.yml
@@ -9,6 +9,7 @@ on:
 
 permissions:
   pull-requests: write
+  contents: write
 
 # Note: this action runs with write permissions on GITHUB_TOKEN even from forks
 # so it must not run untrusted code (such as checking out the pull request)