diff --git a/libs/arcade-mcp-server/arcade_mcp_server/session.py b/libs/arcade-mcp-server/arcade_mcp_server/session.py
index 0c4757c9..1d7b744f 100644
--- a/libs/arcade-mcp-server/arcade_mcp_server/session.py
+++ b/libs/arcade-mcp-server/arcade_mcp_server/session.py
@@ -376,7 +376,7 @@ class ServerSession:
             # Send response if any
             if response and self.write_stream:
                 if hasattr(response, "model_dump_json"):
-                    response_data = response.model_dump_json(exclude_none=True)
+                    response_data = response.model_dump_json(exclude_none=True, by_alias=True)
                 else:
                     response_data = json.dumps(response)
 
diff --git a/libs/arcade-mcp-server/pyproject.toml b/libs/arcade-mcp-server/pyproject.toml
index 2daba31e..0551f712 100644
--- a/libs/arcade-mcp-server/pyproject.toml
+++ b/libs/arcade-mcp-server/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "arcade-mcp-server"
-version = "1.2.0"
+version = "1.2.1"
 description = "Model Context Protocol (MCP) server framework for Arcade.dev"
 readme = "README.md"
 authors = [{ name = "Arcade.dev" }]