diff --git a/dev-requirements/dev.txt b/dev-requirements/dev.txt
index 559d114c..e9051747 100644
--- a/dev-requirements/dev.txt
+++ b/dev-requirements/dev.txt
@@ -3,7 +3,7 @@ attrs==21.2.0
 bleach==3.3.0
 build==0.3.1.post1
 cellmlmanip==0.3.6
-certifi==2023.7.22
+certifi==2024.7.4
 chardet==4.0.0
 colorama==0.4.4
 coverage==5.5