diff --git a/pyproject.toml b/pyproject.toml
index f43e09c..6cf9956 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ packages = ["stackone_ai"]
 "stackone_ai/py.typed" = "stackone_ai/py.typed"
 
 [project.optional-dependencies]
-mcp = ["mcp>=1.3.0"]
+mcp = ["mcp>=1.3.0,<2.0.0"]
 pydantic-ai = ["pydantic-ai-slim>=1.83.0,<2.0.0"]
 examples = [
   "crewai>=0.102.0",
diff --git a/uv.lock b/uv.lock
index ae58b42..ceec35e 100644
--- a/uv.lock
+++ b/uv.lock
@@ -4811,7 +4811,7 @@ requires-dist = [
     { name = "langchain-core", specifier = ">=0.1.0" },
     { name = "langchain-openai", marker = "extra == 'examples'", specifier = ">=1.1.14" },
     { name = "langgraph", marker = "extra == 'examples'", specifier = ">=1.1.6" },
-    { name = "mcp", marker = "extra == 'mcp'", specifier = ">=1.3.0" },
+    { name = "mcp", marker = "extra == 'mcp'", specifier = ">=1.3.0,<2.0.0" },
     { name = "numpy", specifier = ">=1.24.0" },
     { name = "openai", marker = "extra == 'examples'", specifier = ">=2.32.0" },
     { name = "pydantic", specifier = ">=2.10.6" },