diff --git a/pyproject.toml b/pyproject.toml
index 958cf3c..e275d71 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ dependencies = [
     "datetime==5.5",
     "plotly==6.2.0",
     "scipy==1.15.3",
-    "msgpack==1.1.1",
+    "msgpack==1.2.1",
     "msgpack-numpy==0.4.8",
     "requests>=2.31.0",
     "nbformat==5.10.4",