diff --git a/requirements.txt b/requirements.txt
index d9949ea..7caed11 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 astroid==1.4.7
 backports.ssl-match-hostname==3.5.0.1
 git+https://github.com/CDECatapult/behave.git@v1.3.1
-certifi==2016.2.28
+certifi==2022.12.7
 cloverpy==0.1.1
 cov-core==1.15.0
 coverage==4.1