diff --git a/pyproject.toml b/pyproject.toml
index c05f43e59..5924f4475 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ classifiers = [
 
 dependencies = [
     "argcomplete==3.6.3",
-    "certifi==2026.4.22",
+    "certifi==2026.5.20",
     "defusedxml==0.7.1",
     "jsonschema==4.25.1",
     "matplotlib==3.9.4; python_version < '3.10'",