diff --git a/requirements.txt b/requirements.txt
index 029c0cff..c4cbe4e0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-certifi==2016.2.28
+certifi==2016.9.26
 flask==0.11.1
 flask-babel==0.11.1
 lxml==3.6.0