diff --git a/.mergify.yml b/.mergify.yml
index cfc2440..75a6fb0 100644
--- a/.mergify.yml
+++ b/.mergify.yml
@@ -52,7 +52,6 @@ queue_rules:
   - name: lowprio
     <<: *DefaultQueueOptions
     merge_method: merge
-    speculative_checks: 1
     queue_conditions:
       - and: *CheckRuns
       - "#commits=1"
@@ -74,7 +73,7 @@ queue_rules:
     queue_branch_merge_method: fast-forward
     disallow_checks_interruption_from_queues:
       - default
-    commit_message_template: null
+    commit_message_template:
 
 pull_request_rules:
   - name: automatic merge
@@ -97,3 +96,6 @@ pull_request_rules:
       request_reviews:
         teams:
           - devs
+
+merge_queue:
+  max_parallel_checks: 5