diff --git a/src/time/pyproject.toml b/src/time/pyproject.toml
index f9be050452..84a34c4763 100644
--- a/src/time/pyproject.toml
+++ b/src/time/pyproject.toml
@@ -17,7 +17,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
 ]
 dependencies = [
-    "mcp>=1.23.0",
+    "mcp>=1.23.0,<2",
     "pydantic>=2.0.0",
     "tzdata>=2024.2",
     "tzlocal>=5.3.1",
diff --git a/src/time/uv.lock b/src/time/uv.lock
index e77b3c3820..a9585011d4 100644
--- a/src/time/uv.lock
+++ b/src/time/uv.lock
@@ -362,7 +362,7 @@ dev = [
 
 [package.metadata]
 requires-dist = [
-    { name = "mcp", specifier = ">=1.23.0" },
+    { name = "mcp", specifier = ">=1.23.0,<2" },
     { name = "pydantic", specifier = ">=2.0.0" },
     { name = "tzdata", specifier = ">=2024.2" },
     { name = "tzlocal", specifier = ">=5.3.1" },