diff --git a/squirrelbattle/settings.py b/squirrelbattle/settings.py
index b5e2c14..549fc5f 100644
--- a/squirrelbattle/settings.py
+++ b/squirrelbattle/settings.py
@@ -73,7 +73,8 @@ class Settings:
         """
         d = json.loads(json_str)
         for key in d:
-            setattr(self, key, d[key])
+            if hasattr(self, key):
+                setattr(self, key, d[key])
 
     def dumps_to_string(self) -> str:
         """