diff --git a/.github/workflows/dotbot-act.yml b/.github/workflows/dotbot-act.yml
index 70982f8..4a59fd9 100644
--- a/.github/workflows/dotbot-act.yml
+++ b/.github/workflows/dotbot-act.yml
@@ -6,10 +6,6 @@ on:
   pull_request_review_comment:
     types: [created]
 
-concurrency:
-  group: dotbot-act-${{ github.event.issue.number || github.event.pull_request.number || github.ref }}
-  cancel-in-progress: false
-
 jobs:
   act:
     name: Act on /dotbot comments
@@ -25,6 +21,15 @@ jobs:
         )
       ) &&
       github.actor != 'dependabot[bot]'
+    # Job-level, not workflow-level: every comment on the repo starts this
+    # workflow, and a workflow-level group is joined even when the job below is
+    # skipped. A skipped run would then cancel a waiting /dotbot run. A job
+    # skipped by `if:` never joins the group. queue: max keeps back-to-back
+    # /dotbot requests queued instead of dropping all but the newest.
+    concurrency:
+      group: dotbot-act-${{ github.event.issue.number || github.event.pull_request.number || github.ref }}
+      cancel-in-progress: false
+      queue: max
     runs-on: ubuntu-latest
     permissions:
       contents: write
diff --git a/README.md b/README.md
index a8e819b..abfb658 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,7 @@ jobs:
           github_approval_token: ${{ secrets.DOTBOT_GITHUB_USER_PAT }}
 ```
 
+
 ### Automatic PR Approval
 
 If the `DOTBOT_GITHUB_USER_PAT` secret is set (passed via the
@@ -70,9 +71,6 @@ permissions:
   workflows: write       # needed if /dotbot may edit .github/workflows/*
   pull-requests: write
   issues: write
-concurrency:
-  group: dotbot-act-${{ github.event.issue.number || github.event.pull_request.number || github.ref }}
-  cancel-in-progress: false
 jobs:
   act:
     name: Act on /dotbot comments
@@ -88,6 +86,14 @@ jobs:
         )
       ) &&
       github.actor != 'dependabot[bot]'
+    # Job-level, not workflow-level: every comment starts this workflow, and a
+    # workflow-level group is joined even when the job is skipped, so an
+    # ordinary comment would cancel a waiting /dotbot run. queue: max keeps
+    # back-to-back /dotbot requests queued.
+    concurrency:
+      group: dotbot-act-${{ github.event.issue.number || github.event.pull_request.number || github.ref }}
+      cancel-in-progress: false
+      queue: max
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4