diff --git a/README.md b/README.md
index 082afa00..0f72fb99 100644
--- a/README.md
+++ b/README.md
@@ -25,13 +25,13 @@ __Notes:__ Issues with the output should be reported on the babel [issue tracker
 > webpack 4.x | babel-loader 8.x | babel 7.x
 
 ```bash
-npm install babel-loader @babel/core @babel/preset-env webpack
+npm install -D babel-loader @babel/core @babel/preset-env webpack
 ```
 
 > webpack 4.x | babel-loader 7.x | babel 6.x
 
 ```bash
-npm install babel-loader@7 babel-core babel-preset-env webpack
+npm install -D babel-loader@7 babel-core babel-preset-env webpack
 ```
 
 <h2 align="center">Usage</h2>