diff --git a/server-requirements.txt b/server-requirements.txt
index fd3e8147c..b21d064ef 100644
--- a/server-requirements.txt
+++ b/server-requirements.txt
@@ -26,7 +26,7 @@ pyramid-debugtoolbar==3.0.4
 pyramid-mailer==0.15.1
 pyramid-mako==1.0.2
 pyramid-tm==1.0.1
-python-dateutil=2.8.0
+python-dateutil==2.8.0
 pytz==2018.5
 redis==2.10.5
 repoze.lru==0.6