diff --git a/roles/denyhost/vars/main.yml b/roles/denyhost/vars/main.yml
index 8dacd4f575..5681c3b798 100644
--- a/roles/denyhost/vars/main.yml
+++ b/roles/denyhost/vars/main.yml
@@ -401,6 +401,13 @@ banned_ranges:
       - 213.180.203.0/24
       - 95.108.213.0/24
       - 5.255.231.0/24
+  - name: Azure aggressive crawler
+    ip_range:
+      - 52.145.0.0/16
+      - 52.146.0.0/15
+      - 52.148.0.0/14
+      - 52.152.0.0/13
+      - 52.160.0.0/11
 # Below is an example of banning Francis
 # - name: Francis test | Description (see ticket 12345)
 # ip_range: