diff --git a/requirements.txt b/requirements.txt
index b80d43bd2..9eb67dc4a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ selenium>=2.42
 six>=1.8.0
 sqlparse>=0.2.2
 tqdm>=3.7.0
-Trac>=1.0.10
+Trac>=1.0.10,<1.2
 Unidecode>=0.4.18
 #wsgiref>=0.1.2
 xml2rfc>=2.5.