diff --git a/weather-server-python/pyproject.toml b/weather-server-python/pyproject.toml
index 1e82eaf5..851b41ed 100644
--- a/weather-server-python/pyproject.toml
+++ b/weather-server-python/pyproject.toml
@@ -8,7 +8,7 @@ requires-python = ">=3.10"
 # install a second HTTP stack alongside it.
 dependencies = [
     "httpx2>=2.13.1",
-    "mcp[cli]>=2.2.0",
+    "mcp[cli]>=2.3.0",
     # weather.py imports BaseModel, Field, and RootModel directly. RootModel is v2-only.
     "pydantic>=2.14.1",
 ]
diff --git a/weather-server-python/uv.lock b/weather-server-python/uv.lock
index 89aa6a60..3ca79ac9 100644
--- a/weather-server-python/uv.lock
+++ b/weather-server-python/uv.lock
@@ -1068,7 +1068,7 @@ dev = [
 [package.metadata]
 requires-dist = [
     { name = "httpx2", specifier = ">=2.13.1" },
-    { name = "mcp", extras = ["cli"], specifier = ">=2.2.0" },
+    { name = "mcp", extras = ["cli"], specifier = ">=2.3.0" },
     { name = "pydantic", specifier = ">=2.14.1" },
 ]