diff --git a/docs/requirements.txt b/docs/requirements.txt
index 2f6c162..042626f 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -6,7 +6,7 @@ Pygments==2.3.1
 argparse==1.2.1
 backports-abc==0.4
 backports.ssl-match-hostname==3.5.0.1
-certifi==2016.2.28
+certifi==2022.12.7
 click==6.6
 futures==3.2.0
 livereload==2.6.0