diff --git a/valve/steam/id.py b/valve/steam/id.py
index e59298b..ab8fe2c 100644
--- a/valve/steam/id.py
+++ b/valve/steam/id.py
@@ -220,7 +220,7 @@ def __init__(self, account_number, instance, type, universe):
         if instance not in [1, 0]:
             raise SteamIDError(
                 "Expected instance to be 1 or 0, got {}".format(instance))
-        self.account_number = account_number  # Z
+        self.account_number = int(account_number)  # Z
         self.instance = instance  # Y
         self.type = type
         self.universe = universe  # X