diff --git a/docs/AddGenerator.html b/docs/AddGenerator.html
index 7947ac6478e..acf6bcccb56 100644
--- a/docs/AddGenerator.html
+++ b/docs/AddGenerator.html
@@ -192,7 +192,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/InitGenerator.html b/docs/InitGenerator.html
index 652a0c6ee92..7b00d320bd7 100644
--- a/docs/InitGenerator.html
+++ b/docs/InitGenerator.html
@@ -192,7 +192,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/LoaderGenerator.html b/docs/LoaderGenerator.html
index e2d1e96901d..a5eeb1e9822 100644
--- a/docs/LoaderGenerator.html
+++ b/docs/LoaderGenerator.html
@@ -172,7 +172,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/PluginGenerator.html b/docs/PluginGenerator.html
index 5ba9aa76fc8..0c7fbbb8922 100644
--- a/docs/PluginGenerator.html
+++ b/docs/PluginGenerator.html
@@ -172,7 +172,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/commands_add.js.html b/docs/commands_add.js.html
index 851214539bc..c57325bbeba 100644
--- a/docs/commands_add.js.html
+++ b/docs/commands_add.js.html
@@ -58,7 +58,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/commands_init.js.html b/docs/commands_init.js.html
index 16293572c05..19e7ec5f543 100644
--- a/docs/commands_init.js.html
+++ b/docs/commands_init.js.html
@@ -63,7 +63,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/commands_migrate.js.html b/docs/commands_migrate.js.html
index 93df1958aa8..c5f1edcd5c3 100644
--- a/docs/commands_migrate.js.html
+++ b/docs/commands_migrate.js.html
@@ -35,6 +35,10 @@ <h1 class="page-title">Source: commands/migrate.js</h1>
 const PLazy = require("p-lazy");
 const Listr = require("listr");
 
+const validateSchema = require("webpack/lib/validateSchema");
+const WebpackOptionsValidationError = require("webpack/lib/WebpackOptionsValidationError");
+const webpackOptionsSchema = require("webpack/schemas/webpackOptionsSchema.json");
+
 const runPrettier = require("../utils/run-prettier");
 
 /**
@@ -110,7 +114,7 @@ <h1 class="page-title">Source: commands/migrate.js</h1>
 					process.stdout.write(chalk.red(`- ${diffLine.value}`));
 				}
 			});
-			inquirer
+			return inquirer
 				.prompt([
 					{
 						type: "confirm",
@@ -121,20 +125,50 @@ <h1 class="page-title">Source: commands/migrate.js</h1>
 				])
 				.then(answers => {
 					if (answers["confirmMigration"]) {
-						runPrettier(outputConfigPath, result, err => {
-							if (err) {
-								throw err;
-							} else {
-								console.log(
-									chalk.green(
-										`\n ✔︎ New webpack v2 config file is at ${outputConfigPath}`
-									)
-								);
+						return inquirer.prompt([
+							{
+								type: "confirm",
+								name: "confirmValidation",
+								message:
+									"Do you want to validate your configuration? " +
+									"(If you're using webpack merge, validation isn't useful)",
+								default: "Y"
 							}
-						});
+						]);
 					} else {
 						console.log(chalk.red("✖ Migration aborted"));
 					}
+				})
+				.then(answer => {
+					runPrettier(outputConfigPath, result, err => {
+						if (err) {
+							throw err;
+						}
+					});
+
+					if (answer["confirmValidation"]) {
+						const webpackOptionsValidationErrors = validateSchema(
+							webpackOptionsSchema,
+							require(outputConfigPath)
+						);
+						if (webpackOptionsValidationErrors.length) {
+							console.log(
+								chalk.red(
+									"\n✖ Your configuration validation wasn't successful \n"
+								)
+							);
+							console.error(
+								new WebpackOptionsValidationError(
+									webpackOptionsValidationErrors
+								).message
+							);
+						}
+					}
+					console.log(
+						chalk.green(
+							`\n ✔︎ New webpack v2 config file is at ${outputConfigPath}`
+						)
+					);
 				});
 		})
 		.catch(err => {
@@ -159,7 +193,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/commands_remove.js.html b/docs/commands_remove.js.html
index 6133cf30433..24996d41d56 100644
--- a/docs/commands_remove.js.html
+++ b/docs/commands_remove.js.html
@@ -58,7 +58,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/commands_update.js.html b/docs/commands_update.js.html
index d9804ce36ac..a9c74d14cc3 100644
--- a/docs/commands_update.js.html
+++ b/docs/commands_update.js.html
@@ -58,7 +58,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/generate-loader_index.js.html b/docs/generate-loader_index.js.html
index e8ca1b9e0cc..ca589597fba 100644
--- a/docs/generate-loader_index.js.html
+++ b/docs/generate-loader_index.js.html
@@ -59,7 +59,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:01 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/generate-plugin_index.js.html b/docs/generate-plugin_index.js.html
index 40512385c32..c0197219c1d 100644
--- a/docs/generate-plugin_index.js.html
+++ b/docs/generate-plugin_index.js.html
@@ -59,7 +59,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/generators_add-generator.js.html b/docs/generators_add-generator.js.html
index 5261b97fb7c..65eaa2db031 100644
--- a/docs/generators_add-generator.js.html
+++ b/docs/generators_add-generator.js.html
@@ -419,7 +419,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:01 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/generators_init-generator.js.html b/docs/generators_init-generator.js.html
index 3ded891a0c9..b47a388f62a 100644
--- a/docs/generators_init-generator.js.html
+++ b/docs/generators_init-generator.js.html
@@ -455,7 +455,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:01 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/generators_loader-generator.js.html b/docs/generators_loader-generator.js.html
index c15b8a68d7c..b3714e72b56 100644
--- a/docs/generators_loader-generator.js.html
+++ b/docs/generators_loader-generator.js.html
@@ -100,7 +100,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:01 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/generators_plugin-generator.js.html b/docs/generators_plugin-generator.js.html
index 5f7ec340c65..3fad2495d0e 100644
--- a/docs/generators_plugin-generator.js.html
+++ b/docs/generators_plugin-generator.js.html
@@ -81,7 +81,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/generators_utils_entry.js.html b/docs/generators_utils_entry.js.html
index e1bfdbca4b6..aee48cdc8ed 100644
--- a/docs/generators_utils_entry.js.html
+++ b/docs/generators_utils_entry.js.html
@@ -132,7 +132,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/generators_utils_module.js.html b/docs/generators_utils_module.js.html
index 0fa96ec6076..a1c07111bf3 100644
--- a/docs/generators_utils_module.js.html
+++ b/docs/generators_utils_module.js.html
@@ -61,7 +61,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/generators_utils_plugins.js.html b/docs/generators_utils_plugins.js.html
index 17aed406a45..2b00417afdb 100644
--- a/docs/generators_utils_plugins.js.html
+++ b/docs/generators_utils_plugins.js.html
@@ -56,7 +56,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/generators_utils_tooltip.js.html b/docs/generators_utils_tooltip.js.html
index b1465f907b8..49e00540040 100644
--- a/docs/generators_utils_tooltip.js.html
+++ b/docs/generators_utils_tooltip.js.html
@@ -98,7 +98,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/generators_utils_validate.js.html b/docs/generators_utils_validate.js.html
index 00dc305e4e4..a06a6e2f6d1 100644
--- a/docs/generators_utils_validate.js.html
+++ b/docs/generators_utils_validate.js.html
@@ -59,7 +59,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/generators_webpack-generator.js.html b/docs/generators_webpack-generator.js.html
index be3ca166981..dfb3e47b4c8 100644
--- a/docs/generators_webpack-generator.js.html
+++ b/docs/generators_webpack-generator.js.html
@@ -119,7 +119,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/global.html b/docs/global.html
index 8a4ec7850f2..67846eee9d2 100644
--- a/docs/global.html
+++ b/docs/global.html
@@ -7023,7 +7023,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/index.html b/docs/index.html
index 36f48c18ca2..c0db5b40330 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -56,7 +56,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/index.js.html b/docs/index.js.html
index b0d7a3723e4..d0ae2948239 100644
--- a/docs/index.js.html
+++ b/docs/index.js.html
@@ -96,7 +96,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/init_index.js.html b/docs/init_index.js.html
index 18fdc837b80..42cce8622ff 100644
--- a/docs/init_index.js.html
+++ b/docs/init_index.js.html
@@ -107,7 +107,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:01 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/init_transformations_context_context.js.html b/docs/init_transformations_context_context.js.html
index 3d2fdc28114..603f40112b1 100644
--- a/docs/init_transformations_context_context.js.html
+++ b/docs/init_transformations_context_context.js.html
@@ -97,7 +97,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/init_transformations_devServer_devServer.js.html b/docs/init_transformations_devServer_devServer.js.html
index 018b71c5051..b63a3fb57a5 100644
--- a/docs/init_transformations_devServer_devServer.js.html
+++ b/docs/init_transformations_devServer_devServer.js.html
@@ -131,7 +131,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
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index 6e39d4a4c2c..7eba4881397 100644
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 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/utils_modify-config-helper.js.html b/docs/utils_modify-config-helper.js.html
index ccde9cf3d3d..bfe95617ece 100644
--- a/docs/utils_modify-config-helper.js.html
+++ b/docs/utils_modify-config-helper.js.html
@@ -82,7 +82,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/utils_npm-exists.js.html b/docs/utils_npm-exists.js.html
index 829c33d5ba5..3bb2b1d5173 100644
--- a/docs/utils_npm-exists.js.html
+++ b/docs/utils_npm-exists.js.html
@@ -65,7 +65,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/utils_npm-packages-exists.js.html b/docs/utils_npm-packages-exists.js.html
index 5b4b93c6808..cd95bd9b28f 100644
--- a/docs/utils_npm-packages-exists.js.html
+++ b/docs/utils_npm-packages-exists.js.html
@@ -88,7 +88,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/utils_package-manager.js.html b/docs/utils_package-manager.js.html
index deaf5138563..7e2f299579a 100644
--- a/docs/utils_package-manager.js.html
+++ b/docs/utils_package-manager.js.html
@@ -119,7 +119,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:01 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/utils_prop-types.js.html b/docs/utils_prop-types.js.html
index 833b27cde4f..50efcea9cc0 100644
--- a/docs/utils_prop-types.js.html
+++ b/docs/utils_prop-types.js.html
@@ -76,7 +76,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/utils_resolve-packages.js.html b/docs/utils_resolve-packages.js.html
index 435447a6e05..82adf00a60e 100644
--- a/docs/utils_resolve-packages.js.html
+++ b/docs/utils_resolve-packages.js.html
@@ -110,7 +110,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/docs/utils_run-prettier.js.html b/docs/utils_run-prettier.js.html
index 060db4bbd89..0c5cf741b94 100644
--- a/docs/utils_run-prettier.js.html
+++ b/docs/utils_run-prettier.js.html
@@ -86,7 +86,7 @@ <h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="AddGenera
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 17:41:58 GMT+0100 (CET)
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Mon Dec 18 2017 18:40:02 GMT+0100 (CET)
 </footer>
 
 <script> prettyPrint(); </script>
diff --git a/lib/commands/migrate.js b/lib/commands/migrate.js
index b4369e3c504..670e26c8d0f 100644
--- a/lib/commands/migrate.js
+++ b/lib/commands/migrate.js
@@ -7,6 +7,10 @@ const inquirer = require("inquirer");
 const PLazy = require("p-lazy");
 const Listr = require("listr");
 
+const validateSchema = require("webpack/lib/validateSchema");
+const WebpackOptionsValidationError = require("webpack/lib/WebpackOptionsValidationError");
+const webpackOptionsSchema = require("webpack/schemas/webpackOptionsSchema.json");
+
 const runPrettier = require("../utils/run-prettier");
 
 /**
@@ -82,7 +86,7 @@ module.exports = function migrate(
 					process.stdout.write(chalk.red(`- ${diffLine.value}`));
 				}
 			});
-			inquirer
+			return inquirer
 				.prompt([
 					{
 						type: "confirm",
@@ -93,20 +97,50 @@ module.exports = function migrate(
 				])
 				.then(answers => {
 					if (answers["confirmMigration"]) {
-						runPrettier(outputConfigPath, result, err => {
-							if (err) {
-								throw err;
-							} else {
-								console.log(
-									chalk.green(
-										`\n ✔︎ New webpack v2 config file is at ${outputConfigPath}`
-									)
-								);
+						return inquirer.prompt([
+							{
+								type: "confirm",
+								name: "confirmValidation",
+								message:
+									"Do you want to validate your configuration? " +
+									"(If you're using webpack merge, validation isn't useful)",
+								default: "Y"
 							}
-						});
+						]);
 					} else {
 						console.log(chalk.red("✖ Migration aborted"));
 					}
+				})
+				.then(answer => {
+					runPrettier(outputConfigPath, result, err => {
+						if (err) {
+							throw err;
+						}
+					});
+
+					if (answer["confirmValidation"]) {
+						const webpackOptionsValidationErrors = validateSchema(
+							webpackOptionsSchema,
+							require(outputConfigPath)
+						);
+						if (webpackOptionsValidationErrors.length) {
+							console.log(
+								chalk.red(
+									"\n✖ Your configuration validation wasn't successful \n"
+								)
+							);
+							console.error(
+								new WebpackOptionsValidationError(
+									webpackOptionsValidationErrors
+								).message
+							);
+						}
+					}
+					console.log(
+						chalk.green(
+							`\n ✔︎ New webpack v2 config file is at ${outputConfigPath}`
+						)
+					);
 				});
 		})
 		.catch(err => {
diff --git a/lib/init/transformations/top-scope/top-scope.test.js b/lib/init/transformations/top-scope/top-scope.test.js
index 7e20df69c56..6522ee5e4c3 100644
--- a/lib/init/transformations/top-scope/top-scope.test.js
+++ b/lib/init/transformations/top-scope/top-scope.test.js
@@ -3,4 +3,10 @@
 const defineTest = require("../../../utils/defineTest");
 
 defineTest(__dirname, "top-scope", "top-scope-0", ["var test = 'me';"], "init");
-defineTest(__dirname, "top-scope", "top-scope-1", ["const webpack = require('webpack');"], "add");
+defineTest(
+	__dirname,
+	"top-scope",
+	"top-scope-1",
+	["const webpack = require('webpack');"],
+	"add"
+);