diff --git a/monkey/monkey_island/cc/services/config.py b/monkey/monkey_island/cc/services/config.py
index 1a8c7d006..6d14505c3 100644
--- a/monkey/monkey_island/cc/services/config.py
+++ b/monkey/monkey_island/cc/services/config.py
@@ -179,6 +179,7 @@ class ConfigService:
             should_encrypt=True,
         )
 
+    @staticmethod
     def _filter_none_values(data):
         if isinstance(data, dict):
             return {