diff --git a/requirements.txt b/requirements.txt
index 1bab5bb8c..428ea2c57 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ pytz>=2014.7
 pyzmail>=1.0.3
 requests!=2.12.*
 rfc2html>=2.0.0
-selenium>=2.42
+selenium>=2.42,<3.8.1
 six>=1.8.0
 sqlparse>=0.2.2
 tblib>=1.3.0