diff --git a/packages/mcp-server/README.md b/packages/mcp-server/README.md
index 5402582..808ce48 100644
--- a/packages/mcp-server/README.md
+++ b/packages/mcp-server/README.md
@@ -9,7 +9,7 @@ It is generated with [Stainless](https://www.stainless.com/).
 You can run the MCP Server directly via `npx`:
 
 ```sh
-export ISAACUS_API_KEY = "My API Key"
+export ISAACUS_API_KEY="My API Key"
 npx -y isaacus-mcp
 ```