Bundlesize pas nécessaire pour faire tourner l'app

package.json

@@ -49,7 +49,6 @@
 		"babel-plugin-ramda": "^2.0.0",
 		"babel-plugin-styled-components": "^1.10.7",
 		"babel-plugin-webpack-alias": "^2.1.2",
-		"bundlesize": "^0.18.0",
 		"chai": "^4.1.2",
 		"connect-history-api-fallback": "^1.5.0",
 		"css-loader": "^0.28.11",
@@ -103,7 +102,8 @@
 	},
 	"optionalDependencies": {
 		"cypress": "^3.6.1",
-		"prerender-spa-plugin": "^3.4.0"
+		"prerender-spa-plugin": "^3.4.0",
+		"bundlesize": "^0.18.0"
 	},
 	"scripts": {
 		"lint:eslintrc": "eslint --print-config .eslintrc.js | eslint-config-prettier-check",