diff --git a/src/qbirr/__init__.py b/src/qbirr/__init__.py
index e678d25..9cf174e 100644
--- a/src/qbirr/__init__.py
+++ b/src/qbirr/__init__.py
@@ -85,7 +85,7 @@ class Qbirr:
         """
         Verify a single transaction.
 
-        provider: cbe | telebirr | abyssinia | dashen | mpesa | awash | ebirr
+        provider: cbe | telebirr | abyssinia | dashen | mpesa | awash | ebirr | zamzam
         ref:      Transaction ref. For Awash, the SMS URL or token. For eBirr, "tenant/token" or URL.
         amount:   Expected payment in ETB.
         receiver_name:    Your receiving account's name (case-insensitive match).