diff --git a/requirements.txt b/requirements.txt
index 279d521..3eb5c89 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-certifi==2018.4.16
+certifi==2021.5.30
 chardet==3.0.4
 httplib2==0.11.3
 idna==2.7