diff --git a/gns3server/web/web_server.py b/gns3server/web/web_server.py
index b0ff599c..8a2f2ff9 100644
--- a/gns3server/web/web_server.py
+++ b/gns3server/web/web_server.py
@@ -44,7 +44,7 @@ import logging
 log = logging.getLogger(__name__)
 
 if not aiohttp.__version__.startswith("2.2"):
-    raise RuntimeError("You need aiohttp 2.0 for running GNS3")
+    raise RuntimeError("aiohttp 2.0 is required to run the GNS3 server")
 
 
 class WebServer: