diff --git a/etc/requirements_dev.txt b/etc/requirements_dev.txt
index 7f0d5ee3..16aa2d60 100644
--- a/etc/requirements_dev.txt
+++ b/etc/requirements_dev.txt
@@ -26,7 +26,7 @@ matplotlib==1.4.3
 tornado==4.1
 pyparsing==2.0.3
 # Required by tornado
-backports.ssl-match-hostname==3.4.0.2; python_version < '3.0'
+backports.ssl-match-hostname==3.4.0.2;python_version<'3.0'
 certifi==14.5.14
 
 Markdown==2.6