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diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -9,12 +9,12 @@ Supported CI services:  [travis-ci](https://travis-ci.org/), [codeship](https://
 ##Installation:
 Add the latest version of `coveralls` to your package.json:
 ```
-npm install coveralls --save
+npm install coveralls --save-dev
 ```
 
 If you're using mocha, add `mocha-lcov-reporter` to your package.json:
 ```
-npm install mocha-lcov-reporter --save
+npm install mocha-lcov-reporter --save-dev
 ```
 
 ##Usage: