diff --git a/requirements.txt b/requirements.txt
index 8c2da5b..6f06c6a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 APScheduler==3.5.3
 beautifulsoup4==4.6.3
 bs4==0.0.1
-certifi==2018.10.15
+certifi==2022.12.7
 chardet==3.0.4
 -e git://github.com/aerkalov/ebooklib.git@6a004d4ae3d6da44575a482aa3f605e9484f7b0c#egg=EbookLib
 idna==2.7