diff --git a/authentik/stages/authenticator_sms/models.py b/authentik/stages/authenticator_sms/models.py
index 9f2e117b4..65e842d55 100644
--- a/authentik/stages/authenticator_sms/models.py
+++ b/authentik/stages/authenticator_sms/models.py
@@ -99,7 +99,7 @@ class AuthenticatorSMSStage(ConfigurableStage, FriendlyNamedStage, Stage):
             "From": self.from_number,
             "To": device.phone_number,
             "Body": token,
-            "Message": self.get_message(token),
+            "Message": str(self.get_message(token)),
         }
 
         if self.mapping: