diff --git a/docusaurus/docs/adding-typescript.md b/docusaurus/docs/adding-typescript.md
index d94bccc4920..06224c3b294 100644
--- a/docusaurus/docs/adding-typescript.md
+++ b/docusaurus/docs/adding-typescript.md
@@ -28,13 +28,13 @@ yarn create react-app my-app --template typescript
 To add [TypeScript](https://www.typescriptlang.org/) to an existing Create React App project, first install it:
 
 ```sh
-npm install --save typescript @types/node @types/react @types/react-dom @types/jest
+npm install --save-dev typescript @types/node @types/react @types/react-dom @types/jest
 ```
 
 or
 
 ```sh
-yarn add typescript @types/node @types/react @types/react-dom @types/jest
+yarn add -D typescript @types/node @types/react @types/react-dom @types/jest
 ```
 
 Next, rename any file to be a TypeScript file (e.g. `src/index.js` to `src/index.tsx`) and create tsconfig.json if it's not in the root of your project [`tsconfig.json` file](https://www.typescriptlang.org/docs/handbook/tsconfig-json.html).