diff --git a/dev-requirements.txt b/dev-requirements.txt
index b40f5ab..e4302fc 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,6 +1,6 @@
 aiostream==0.3.1
 bleach==3.0.1
-certifi==2018.8.24
+certifi==2022.12.7
 cffi==1.11.5
 chardet==3.0.4
 cmarkgfm==0.4.2