diff --git a/src/ModuleManager.py b/src/ModuleManager.py
index 48283c1d..6d1308db 100644
--- a/src/ModuleManager.py
+++ b/src/ModuleManager.py
@@ -130,6 +130,9 @@ class ModuleManager(object):
         else:
             path = "%s.py" % path
 
+        if not os.path.exists(path):
+            raise ModuleNotFoundException(name)
+
         return self.define_module(type, path)
 
     def _module_name(self, path: str) -> str: