diff --git a/requirements.txt b/requirements.txt
index 5be8d67..3ea00a6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 bcrypt==3.1.4
-certifi==2018.1.18
+certifi==2018.11.29
 cffi==1.11.5
 chardet==3.0.4
 colander==1.4