diff --git a/requirements.txt b/requirements.txt
index 3ecadade..d75826b0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
-uvicorn==0.17.6
+uvicorn==0.17.6  ; python_version >= "3.7"
+uvicorn==0.16.0  ; python_version < "3.7"
 fastapi==0.75.0
 python-multipart==0.0.5
 websockets==10.2  ; python_version >= "3.7"