diff --git a/update_security_groups_lambda/update_security_groups.py b/update_security_groups_lambda/update_security_groups.py
index 2e447cd..2c3e7e9 100644
--- a/update_security_groups_lambda/update_security_groups.py
+++ b/update_security_groups_lambda/update_security_groups.py
@@ -71,7 +71,7 @@ def get_ip_groups_json(url, expected_hash):
 
     http = urllib3.PoolManager()
     response = http.request('GET', url)
-    ip_json = response.read()
+    ip_json = response.data
 
     m = hashlib.md5()
     m.update(ip_json)