diff --git a/petsafe_smartfeed/client.py b/petsafe_smartfeed/client.py
index 6bcf5eb..31e9e58 100644
--- a/petsafe_smartfeed/client.py
+++ b/petsafe_smartfeed/client.py
@@ -179,7 +179,7 @@ def refresh_tokens(self, refresh_token=None):
 
         self.id_token = response["AuthenticationResult"]["IdToken"]
         self.access_token = response["AuthenticationResult"]["AccessToken"]
-        self.refresh_token = response["AuthenticationResult"]["RefreshToken"]
+        self.refresh_token = response["AuthenticationResult"].get("RefreshToken", self.refresh_token)
         self.token_expires_time = (
             time.time() + response["AuthenticationResult"]["ExpiresIn"]
         )