diff --git a/tei2json/requirements.txt b/tei2json/requirements.txt
index dbb06c7..8be6cc7 100644
--- a/tei2json/requirements.txt
+++ b/tei2json/requirements.txt
@@ -9,7 +9,7 @@ backcall==0.1.0
 beautifulsoup4==4.9.0
 binaryornot==0.4.4
 bleach==3.1.4
-certifi==2019.11.28
+certifi==2022.12.7
 chardet==3.0.4
 Click==7.0
 colorama==0.4.3