diff --git a/requirements.txt b/requirements.txt
index 9408ba8..06be0bf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-certifi==2019.3.9
+certifi==2019.6.16
 chardet==3.0.4
 decorator==4.4.0
 idna==2.8