diff --git a/requirements.txt b/requirements.txt
index 40b7938..0504668 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-certifi==2019.3.9
+certifi==2019.11.28
 chardet==3.0.4
 decorator==4.4.0
 idna==2.8