diff --git a/pyproject.toml b/pyproject.toml
index 06eda14..fd6d75c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,7 +32,7 @@ dependencies = [
     "jsonschema==4.25.1",
     "jsonschema-specifications==2025.9.1",
     "jupyter_client==8.6.3",
-    "jupyter_core==5.8.1",
+    "jupyter_core==5.9.1",
     "kiwisolver==1.4.9",
     "matplotlib==3.10.7",
     "matplotlib-inline==0.1.7",