diff --git a/requirements.txt b/requirements.txt
index 95b85578e..c9b6d7139 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,3 +15,4 @@ langdetect==1.0.9
 setproctitle==1.2.2
 redis==4.1.1
 mistletoe==0.8.1
+typing_extensions==4.0.1