diff --git a/src/docs/user/userguide/webhooks.diviner b/src/docs/user/userguide/webhooks.diviner
--- a/src/docs/user/userguide/webhooks.diviner
+++ b/src/docs/user/userguide/webhooks.diviner
@@ -66,17 +66,9 @@
 To compute the SHA256 HMAC of a string in Python, do this:
 
 ```lang=python
-from subprocess import check_output
-
-signature = check_output(
-  [
-    "php",
-    "-r",
-    "echo hash_hmac('sha256', $argv[1], $argv[2]);",
-    "--",
-    request_body,
-    hmac_key
-  ])
+import hashlib
+import hmac
+signature = hmac.new(hmac_key, request_body, hashlib.sha256).hexdigest()
 ```
 
 Other languages often provide similar support.