diff --git a/.asf.yaml b/.asf.yaml
index f15ed263..4bb19b8e 100644
--- a/.asf.yaml
+++ b/.asf.yaml
@@ -1,4 +1,6 @@
 github:
+  pull_requests:
+    del_branch_on_merge: true
   homepage: https://datasketches.apache.org
   ghp_branch: gh-pages
   ghp_path: /docs