diff --git a/.github/workflows/pr-merge-bot.yml b/.github/workflows/pr-merge-bot.yml
index a2722f105e..75025daddf 100644
--- a/.github/workflows/pr-merge-bot.yml
+++ b/.github/workflows/pr-merge-bot.yml
@@ -529,7 +529,7 @@ jobs:
       && github.event_name == 'pull_request_target'
     permissions:
       contents: read
-      pull-requests: read
+      pull-requests: write
       issues: write
     runs-on: ubuntu-latest
     timeout-minutes: 5
@@ -636,7 +636,7 @@ jobs:
       && github.event_name == 'pull_request_target'
     permissions:
       contents: read        # delegatable subtree, for file modes
-      pull-requests: read
+      pull-requests: write
       issues: write         # label + comment
     runs-on: ubuntu-latest
     timeout-minutes: 10