diff --git a/src/wallman.py b/src/wallman.py
index ed729f1..70b6a25 100644
--- a/src/wallman.py
+++ b/src/wallman.py
@@ -2,8 +2,8 @@
 import wallman_lib
 
 def main():
-    validator = wallman_lib.ConfigValidity()
-    logic = wallman_lib.WallpaperLogic()
+    validator: wallman_lib.ConfigValidity = wallman_lib.ConfigValidity()
+    logic: wallman_lib.WallpaperLogic = wallman_lib.WallpaperLogic()
     validator.validate_config()
     logic.set_wallpaper_by_time()
     logic.schedule_wallpapers()