diff --git a/requirements.txt b/requirements.txt
index 5300624..2784f1f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ apipkg==1.5
 atomicwrites==1.3.0
 attrs==18.2.0
 bleach==3.1.0
-certifi==2019.3.9
+certifi==2019.6.16
 cffi==1.12.3
 chardet==3.0.4
 Click==7.0