diff --git a/requirements.txt b/requirements.txt
index de771d7..e6daf68 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ Markdown==2.6.2
 MarkupSafe==0.23
 PyYAML==5.1
 backports.ssl-match-hostname==3.4.0.2
-certifi==2015.04.28
+certifi==2022.12.7
 ghp-import==0.4.1
 livereload==2.3.2
 mkdocs==0.15.0