diff --git a/src/app.py b/src/app.py
index 9b9e262..f79a690 100644
--- a/src/app.py
+++ b/src/app.py
@@ -1,6 +1,7 @@
 from argparse import *
 from src.prometheus_metrics_server import *
 from src.metrics_source import *
+from src.metric import *
 
 class App:
     args: Namespace
@@ -39,4 +40,4 @@ class App:
         server.add_metrics_source(custom_metrics_source)
 
         server.run()
-        
\ No newline at end of file
+