diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 2d259ac..003e56d 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -46,6 +46,7 @@ permissions:
   contents: read
   # pull-requests: write is required when post-pr-comment input is true.
   # The caller workflow must grant this permission explicitly.
+  pull-requests: write
 
 jobs:
   coverage: