diff --git a/pyproject.toml b/pyproject.toml
index bec35bb..ac0ddd3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ dependencies = [
     "google-analytics-data==0.23.0",
     "google-analytics-admin==0.30.1",
     "google-auth~=2.40",
-    "mcp>=1.24.0",
+    "mcp>=1.24.0,<2",
     "google-adk>=1.29.0",
     "httpx>=0.28.1",
 ]