diff --git a/src/analyzers/dependencies.py b/src/analyzers/dependencies.py
index fdc2a3e..8c3476c 100644
--- a/src/analyzers/dependencies.py
+++ b/src/analyzers/dependencies.py
@@ -123,7 +123,7 @@ class DependencyAnalyzer:
         return call_graph
 
     def get_architecture_layers(self) -> dict[str, list[str]]:
-        layers = {"presentation": [], "business": [], "data": [], "other": []}
+        layers: dict[str, list[str]] = {"presentation": [], "business": [], "data": [], "other": []}
 
         layer_keywords = {
             "presentation": ["ui", "view", "controller", "handler", "route", "api"],