diff --git a/requirements.txt b/requirements.txt
index 095bc8e..b0721d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 attrs==17.4.0
-certifi==2018.1.18
+certifi==2018.11.29
 chardet==3.0.4
 configparser==3.5.0
 coverage==4.5.1