diff --git a/package.json b/package.json
index 0f979954ba2dc..67714b1706d14 100644
--- a/package.json
+++ b/package.json
@@ -95,7 +95,6 @@
 		"glob": "7.1.2",
 		"husky": "0.14.3",
 		"is-equal-shallow": "0.1.3",
-		"is-plain-obj": "1.1.0",
 		"jsdom": "11.12.0",
 		"lerna": "3.11.1",
 		"lint-staged": "7.3.0",
diff --git a/packages/npm-package-json-lint-config/test/index.test.js b/packages/npm-package-json-lint-config/test/index.test.js
index 1660dda0a8a88..1fb05298c6073 100644
--- a/packages/npm-package-json-lint-config/test/index.test.js
+++ b/packages/npm-package-json-lint-config/test/index.test.js
@@ -1,7 +1,7 @@
 /**
  * External dependencies
  */
-import isPlainObj from 'is-plain-obj';
+import { isPlainObject } from 'lodash';
 
 /**
  * Internal dependencies
@@ -10,10 +10,10 @@ import config from '../';
 
 describe( 'npm-package-json-lint config tests', () => {
 	it( 'should be an object', () => {
-		expect( isPlainObj( config ) ).toBeTruthy();
+		expect( isPlainObject( config ) ).toBeTruthy();
 	} );
 
 	it( 'should have rules property as an object', () => {
-		expect( isPlainObj( config.rules ) ).toBeTruthy();
+		expect( isPlainObject( config.rules ) ).toBeTruthy();
 	} );
 } );