diff --git a/mbed-tls-pr-merge.yaml b/mbed-tls-pr-merge.yaml
index 9bcb127..99032cd 100644
--- a/mbed-tls-pr-merge.yaml
+++ b/mbed-tls-pr-merge.yaml
@@ -4,6 +4,8 @@
     project-type: multibranch
     disabled: false
     prune-dead-branches: true
+    days-to-keep: 60
+    num-to-keep: 1000
     script-path: tests/.jenkins/Jenkinsfile
     properties:
       - raw: