diff --git a/mcp_server/requirements.txt b/mcp_server/requirements.txt
index 9714bd9..239aace 100644
--- a/mcp_server/requirements.txt
+++ b/mcp_server/requirements.txt
@@ -1,2 +1,2 @@
-mcp>=1.0.0
+mcp>=1.0.0,<2
 httpx>=0.27.0