diff --git a/project/__init__.py b/project/__init__.py
index a4ac6de..80d3dbd 100644
--- a/project/__init__.py
+++ b/project/__init__.py
@@ -23,6 +23,7 @@ def getenv_bool(name: str, default: str = "False"):
 def set_env_to_app(app: Flask, key: str, default: str = None):
     if key in os.environ and os.environ[key]:  # pragma: no cover
         app.config[key] = os.environ[key]
+        return
 
     if default:
         app.config[key] = default