diff --git a/main.py b/main.py
index be1719c..8497e15 100644
--- a/main.py
+++ b/main.py
@@ -25,9 +25,9 @@ def call(command: str) -> Response:
 
 def get_hosts() -> list[str]:
     if os.getenv("STAGE") == "development":
-        return list(set(configurator.get_config("hosts") + ["platform.develop.sprinthub.ru"]))
+        return list(set(list(configurator.get_config("hosts")) + ["platform.develop.sprinthub.ru"]))
     else:
-        return list(set(configurator.get_config("hosts") + ["platform.sprinthub.ru"]))
+        return list(set(list(configurator.get_config("hosts")) + ["platform.sprinthub.ru"]))
 
 
 def update_host(host: str) -> bool: