diff --git a/requirements.txt b/requirements.txt
index e65dd05..a9933d9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 alabaster==0.7.7
 Babel==2.3.4
-certifi==2016.2.28
+certifi==2022.12.7
 docutils==0.12
 imagesize==0.7.1
 Jinja2==2.8