diff --git a/requirements-dev.txt b/requirements-dev.txt
index f9a55e1..6b0346b 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,7 +1,7 @@
 -r requirements.txt
 attrs==26.1.0
 build==1.4.4
-certifi==2026.4.22
+certifi==2026.5.20
 colorama==0.4.6
 flake8==7.3.0
 iniconfig==2.1.0