diff --git a/pyproject.toml b/pyproject.toml
index f9c0b5e..d231071 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@
   "fastapi>=0.115",
   "gnexus-gauth @ git+https://git.gnexus.space/git/root/gnexus-auth-client-py.git",
   "httpx>=0.27",
-  "mcp>=1.27.1",
+  "mcp>=1.27.1,<2",
   "psycopg[binary]>=3.2",
   "pydantic-settings>=2.4",
   "python-multipart>=0.0.9",
diff --git a/uv.lock b/uv.lock
index c9e058d..393053e 100644
--- a/uv.lock
+++ b/uv.lock
@@ -367,7 +367,7 @@
     { name = "fastapi", specifier = ">=0.115" },
     { name = "gnexus-gauth", git = "https://git.gnexus.space/git/root/gnexus-auth-client-py.git" },
     { name = "httpx", specifier = ">=0.27" },
-    { name = "mcp", specifier = ">=1.27.1" },
+    { name = "mcp", specifier = ">=1.27.1,<2" },
     { name = "psycopg", extras = ["binary"], specifier = ">=3.2" },
     { name = "pydantic-settings", specifier = ">=2.4" },
     { name = "pytest", marker = "extra == 'dev'", specifier = ">=8" },