diff --git a/.github/workflows/milestone.yml b/.github/workflows/milestone.yml
index 05d1f83c8..34e7652a7 100644
--- a/.github/workflows/milestone.yml
+++ b/.github/workflows/milestone.yml
@@ -11,6 +11,9 @@ on:
 
 jobs:
   update-milestone:
+    # Ignore bot-authored pull requests (dependabot, app bots, etc)
+    # and CI-only PRs.
+    if: github.event_name == 'issues' || (github.event.pull_request.user.type != 'Bot' && !startsWith(github.event.pull_request.title, 'ci:'))
     runs-on: namespace-profile-ghostty-sm
     name: Milestone Update
     steps: