diff --git a/constraints.txt b/constraints.txt
index ca52c8f5..690e4146 100644
--- a/constraints.txt
+++ b/constraints.txt
@@ -4,7 +4,7 @@ attrs==26.1.0
 babel==2.18.0
 backports.asyncio.runner==1.2.0
 backports.tarfile==1.2.0
-certifi==2026.4.22
+certifi==2026.5.20
 charset-normalizer==3.4.7
 check-wheel-contents==0.6.3
 cffi==2.0.0