diff --git a/requirements.txt b/requirements.txt
index 0b1d5b1db..b90e5c320 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -60,6 +60,7 @@ sqlparse>=0.2.2
 tblib>=1.3.0
 tqdm>=3.7.0
 Trac>=1.0.10,<1.2
+typing>=3.7.4.1
 Unidecode>=0.4.18
 #wsgiref>=0.1.2
 xml2rfc>=2.9.3,!=2.6.0