diff --git a/monkey/common/base_models.py b/monkey/common/base_models.py
index 5d82be324..9521e4e68 100644
--- a/monkey/common/base_models.py
+++ b/monkey/common/base_models.py
@@ -5,6 +5,7 @@ from pydantic import BaseModel, Extra, ValidationError
 
 
 class InfectionMonkeyModelConfig:
+    allow_mutation = False
     underscore_attrs_are_private = True
     extra = Extra.forbid