diff --git a/scrapypuppeteer/browser_managers/service_browser_manager.py b/scrapypuppeteer/browser_managers/service_browser_manager.py
index 9cafa92..22051c1 100644
--- a/scrapypuppeteer/browser_managers/service_browser_manager.py
+++ b/scrapypuppeteer/browser_managers/service_browser_manager.py
@@ -8,8 +8,8 @@ def __init__(self):
     def _download_request(self, request, spider):
         return request
 
-    def _start_browser_manager(self) -> None:
+    async def _start_browser_manager(self) -> None:
         return
 
-    def _stop_browser_manager(self) -> None:
+    async def _stop_browser_manager(self) -> None:
         return