diff --git a/pyproject.toml b/pyproject.toml
index 05494d85f..a57b1e304 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "mcp"
-version = "1.3.0.dev0"
+version = "1.2.1"
 description = "Model Context Protocol SDK"
 readme = "README.md"
 requires-python = ">=3.10"