diff --git a/requirements.txt b/requirements.txt
index 7a4f24f..859badb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,7 @@ Django==1.10.3
 Fabric==1.12.0
 PyYAML==3.12
 Pygments==2.1.3
+certifi==2016.9.26
 dj-database-url==0.4.1
 dj-static==0.0.6
 django-annoying==0.10.3