diff --git a/api/requirements.txt b/api/requirements.txt
index 6be07f1..aaf9bf6 100644
--- a/api/requirements.txt
+++ b/api/requirements.txt
@@ -18,3 +18,5 @@ psycopg~=3.1.8
 shapely~=2.0.1
 pyproj~=3.4.1
 aiohttp~=3.8.1
+# sanic requires websocets and chockes on >=10 in 2022.6.2
+websockets<11