diff --git a/pyproject.toml b/pyproject.toml
index 8ada67cd9d..0fb7b263c9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -85,7 +85,7 @@ wheel = [
   "lz4==4.4.5",
   "matplotlib==3.10.7",
   "mcp==1.28.1",
-  "msgpack==1.1.1",
+  "msgpack==1.2.1",
   "netCDF4==1.7.4",
   "networkx==3.3",
   "numpy==2.4.6",