diff --git a/requirements.txt b/requirements.txt
index 39a9b56..2a6cd76 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 bcrypt==3.1.7
-certifi==2019.6.16
+certifi==2019.9.11
 cffi==1.12.3
 chardet==3.0.4
 colander==1.7.0