diff --git a/pyproject.toml b/pyproject.toml
index d918ff1..d42fb4b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ classifiers = [
 
 dependencies = [
     # mcp 2.x removed `mcp.server.fastmcp`; pin <2.0 until we adapt to the new API.
-    "mcp>=1.6.0,<2.0",
+    "mcp>=2.1.1,<3.0",
     "pyyaml>=6.0",
     "tomli>=2.0.0; python_version<'3.11'",
 ]
diff --git a/requirements.txt b/requirements.txt
index 083c5bd..5826ea7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,6 @@
 # Lightweight: no torch / transformers / tree-sitter required — the
 # server parses Python with the standard-library `ast` module.
 # mcp 2.x removed `mcp.server.fastmcp`; pin <2.0 until we adapt to the new API.
-mcp>=1.6.0,<2.0
+mcp>=2.1.1,<3.0
 pyyaml>=6.0
 tomli>=2.0.0; python_version<"3.11"