diff --git a/declarations/WebpackOptions.d.ts b/declarations/WebpackOptions.d.ts
index a6e8f7739..56058b1c7 100644
--- a/declarations/WebpackOptions.d.ts
+++ b/declarations/WebpackOptions.d.ts
@@ -730,10 +730,6 @@ export interface ResolveOptions {
 	 * Enforce using one of the extensions from the extensions option
 	 */
 	enforceExtension?: boolean;
-	/**
-	 * Enforce using one of the module extensions from the moduleExtensions option
-	 */
-	enforceModuleExtension?: boolean;
 	/**
 	 * Extensions added to the request when trying to find the file
 	 */
@@ -752,10 +748,6 @@ export interface ResolveOptions {
 	 * Filenames used to find the default entry point if there is no description file or main field
 	 */
 	mainFiles?: ArrayOfStringValues;
-	/**
-	 * Extensions added to the module request when trying to find the module
-	 */
-	moduleExtensions?: ArrayOfStringValues;
 	/**
 	 * Folder names or directory paths where to find modules
 	 */
diff --git a/lib/Compilation.js b/lib/Compilation.js
index 96f2a69cc..0330973c9 100644
--- a/lib/Compilation.js
+++ b/lib/Compilation.js
@@ -2259,16 +2259,6 @@ class Compilation {
 				addAllToSet(this.missingDependencies, missingDependencies);
 			}
 		}
-
-		for (const error of this.errors) {
-			if (
-				typeof error.missing === "object" &&
-				error.missing &&
-				error.missing[Symbol.iterator]
-			) {
-				addAllToSet(this.missingDependencies, error.missing);
-			}
-		}
 	}
 
 	createModuleHashes() {
diff --git a/lib/ContextModuleFactory.js b/lib/ContextModuleFactory.js
index c768a144b..db71a9b07 100644
--- a/lib/ContextModuleFactory.js
+++ b/lib/ContextModuleFactory.js
@@ -59,10 +59,22 @@ module.exports = class ContextModuleFactory extends ModuleFactory {
 				...dependency.options
 			},
 			(err, beforeResolveResult) => {
-				if (err) return callback(err);
+				if (err) {
+					return callback(err, {
+						fileDependencies,
+						missingDependencies,
+						contextDependencies
+					});
+				}
 
 				// Ignored
-				if (!beforeResolveResult) return callback();
+				if (!beforeResolveResult) {
+					return callback(null, {
+						fileDependencies,
+						missingDependencies,
+						contextDependencies
+					});
+				}
 
 				const context = beforeResolveResult.context;
 				const request = beforeResolveResult.request;
@@ -113,7 +125,11 @@ module.exports = class ContextModuleFactory extends ModuleFactory {
 								{},
 								context,
 								resource,
-								{},
+								{
+									fileDependencies,
+									missingDependencies,
+									contextDependencies
+								},
 								(err, result) => {
 									if (err) return callback(err);
 									callback(null, result);
@@ -128,7 +144,11 @@ module.exports = class ContextModuleFactory extends ModuleFactory {
 										{},
 										context,
 										loader,
-										{},
+										{
+											fileDependencies,
+											missingDependencies,
+											contextDependencies
+										},
 										(err, result) => {
 											if (err) return callback(err);
 											callback(null, result);
@@ -140,7 +160,13 @@ module.exports = class ContextModuleFactory extends ModuleFactory {
 						}
 					],
 					(err, result) => {
-						if (err) return callback(err);
+						if (err) {
+							return callback(err, {
+								fileDependencies,
+								missingDependencies,
+								contextDependencies
+							});
+						}
 
 						this.hooks.afterResolve.callAsync(
 							{
@@ -153,10 +179,22 @@ module.exports = class ContextModuleFactory extends ModuleFactory {
 								...beforeResolveResult
 							},
 							(err, result) => {
-								if (err) return callback(err);
+								if (err) {
+									return callback(err, {
+										fileDependencies,
+										missingDependencies,
+										contextDependencies
+									});
+								}
 
 								// Ignored
-								if (!result) return callback();
+								if (!result) {
+									return callback(null, {
+										fileDependencies,
+										missingDependencies,
+										contextDependencies
+									});
+								}
 
 								return callback(null, {
 									module: new ContextModule(result.resolveDependencies, result),
@@ -185,6 +223,7 @@ module.exports = class ContextModuleFactory extends ModuleFactory {
 		const addDirectory = (directory, callback) => {
 			fs.readdir(directory, (err, files) => {
 				if (err) return callback(err);
+				files = files.map(file => file.normalize("NFC"));
 				files = cmf.hooks.contextModuleFiles.call(files);
 				if (!files || files.length === 0) return callback(null, []);
 				asyncLib.map(
diff --git a/lib/MemoryOutputFileSystem.js b/lib/MemoryOutputFileSystem.js
deleted file mode 100644
index 6d63a8497..000000000
--- a/lib/MemoryOutputFileSystem.js
+++ /dev/null
@@ -1,8 +0,0 @@
-/*
-	MIT License http://www.opensource.org/licenses/mit-license.php
-	Author Tobias Koppers @sokra
-*/
-
-"use strict";
-
-module.exports = require("memory-fs");
diff --git a/lib/ModuleNotFoundError.js b/lib/ModuleNotFoundError.js
index 958f793d5..d043b52a7 100644
--- a/lib/ModuleNotFoundError.js
+++ b/lib/ModuleNotFoundError.js
@@ -80,7 +80,6 @@ class ModuleNotFoundError extends WebpackError {
 
 		this.name = "ModuleNotFoundError";
 		this.details = err.details;
-		this.missing = err.missing;
 		this.module = module;
 		this.error = err;
 		this.loc = loc;
diff --git a/lib/NormalModuleFactory.js b/lib/NormalModuleFactory.js
index 0e43a7d4e..9b07fc179 100644
--- a/lib/NormalModuleFactory.js
+++ b/lib/NormalModuleFactory.js
@@ -274,7 +274,6 @@ class NormalModuleFactory extends ModuleFactory {
 
 				const resolveContext = {
 					fileDependencies,
-					missing: missingDependencies,
 					missingDependencies,
 					contextDependencies
 				};
@@ -473,12 +472,6 @@ class NormalModuleFactory extends ModuleFactory {
 					resolveContext,
 					(err, resolvedResource, resolvedResourceResolveData) => {
 						if (err) return continueCallback(err);
-
-						// TODO remove this when enhanced-resolve supports fileDependencies
-						if (resolvedResource) {
-							fileDependencies.add(resolvedResource);
-						}
-
 						resource = resolvedResource;
 						resourceResolveData = resolvedResourceResolveData;
 						continueCallback();
@@ -520,16 +513,34 @@ class NormalModuleFactory extends ModuleFactory {
 			createData: {}
 		};
 		this.hooks.beforeResolve.callAsync(resolveData, (err, result) => {
-			if (err) return callback(err);
+			if (err) {
+				return callback(err, {
+					fileDependencies,
+					missingDependencies,
+					contextDependencies
+				});
+			}
 
 			// Ignored
-			if (result === false) return callback();
+			if (result === false) {
+				return callback(null, {
+					fileDependencies,
+					missingDependencies,
+					contextDependencies
+				});
+			}
 
 			if (typeof result === "object")
 				throw new Error(deprecationChangedHookMessage("beforeResolve"));
 
 			this.hooks.factorize.callAsync(resolveData, (err, module) => {
-				if (err) return callback(err);
+				if (err) {
+					return callback(err, {
+						fileDependencies,
+						missingDependencies,
+						contextDependencies
+					});
+				}
 
 				const factoryResult = {
 					module,
@@ -601,12 +612,6 @@ class NormalModuleFactory extends ModuleFactory {
 									: item.options,
 							ident: item.options === undefined ? undefined : item.ident
 						};
-
-						// TODO remove this when enhanced-resolve supports fileDependencies
-						if (resolved.loader) {
-							resolveContext.fileDependencies.add(resolved.loader);
-						}
-
 						return callback(null, resolved);
 					}
 				);
diff --git a/lib/WebpackError.js b/lib/WebpackError.js
index 434bd9741..040d67b9a 100644
--- a/lib/WebpackError.js
+++ b/lib/WebpackError.js
@@ -20,7 +20,6 @@ class WebpackError extends Error {
 		super(message);
 
 		this.details = undefined;
-		this.missing = undefined;
 		this.module = undefined;
 		/** @type {DependencyLocation} */
 		this.loc = undefined;
@@ -43,7 +42,6 @@ class WebpackError extends Error {
 		write(this.message);
 		write(this.stack);
 		write(this.details);
-		write(this.missing);
 		write(this.loc);
 		write(this.hideStack);
 	}
@@ -53,7 +51,6 @@ class WebpackError extends Error {
 		this.message = read();
 		this.stack = read();
 		this.details = read();
-		this.missing = read();
 		this.loc = read();
 		this.hideStack = read();
 	}
diff --git a/lib/cache/ResolverCachePlugin.js b/lib/cache/ResolverCachePlugin.js
index baea82922..a92edbc9b 100644
--- a/lib/cache/ResolverCachePlugin.js
+++ b/lib/cache/ResolverCachePlugin.js
@@ -49,7 +49,7 @@ class ResolverCachePlugin {
 			const newResolveContext = {
 				...resolveContext,
 				stack: new Set(),
-				missing: new Set(),
+				missingDependencies: new Set(),
 				fileDependencies: new Set(),
 				contextDependencies: new Set()
 			};
@@ -67,13 +67,13 @@ class ResolverCachePlugin {
 				"Cache miss",
 				newResolveContext,
 				(err, result) => {
-					propagate("missing");
 					propagate("fileDependencies");
 					propagate("contextDependencies");
+					propagate("missingDependencies");
 					if (err) return callback(err);
 					const fileDependencies = newResolveContext.fileDependencies;
 					const contextDependencies = newResolveContext.contextDependencies;
-					const missingDependencies = newResolveContext.missing;
+					const missingDependencies = newResolveContext.missingDependencies;
 					// TODO remove this when enhanced-resolve supports fileDependencies
 					if (result && result.path) {
 						fileDependencies.add(result.path);
@@ -91,9 +91,9 @@ class ResolverCachePlugin {
 								null,
 								{
 									result,
-									missing: newResolveContext.missing,
 									fileDependencies: newResolveContext.fileDependencies,
 									contextDependencies: newResolveContext.contextDependencies,
+									missingDependencies: newResolveContext.missingDependencies,
 									snapshot
 								},
 								storeErr => {
@@ -147,9 +147,9 @@ class ResolverCachePlugin {
 														callback
 													);
 												}
-												if (resolveContext.missing) {
-													for (const item of cacheEntry.missing) {
-														resolveContext.missing.add(item);
+												if (resolveContext.missingDependencies) {
+													for (const item of cacheEntry.missingDependencies) {
+														resolveContext.missingDependencies.add(item);
 													}
 												}
 												if (resolveContext.fileDependencies) {
diff --git a/lib/index.js b/lib/index.js
index 35bff48cb..2a322d128 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -56,7 +56,6 @@ exportPlugins(exports, {
 	LibraryTemplatePlugin: () => require("./LibraryTemplatePlugin"),
 	LoaderOptionsPlugin: () => require("./LoaderOptionsPlugin"),
 	LoaderTargetPlugin: () => require("./LoaderTargetPlugin"),
-	MemoryOutputFileSystem: () => require("./MemoryOutputFileSystem"),
 	Module: () => require("./Module"),
 	ModuleFilenameHelpers: () => require("./ModuleFilenameHelpers"),
 	NoEmitOnErrorsPlugin: () => require("./NoEmitOnErrorsPlugin"),
diff --git a/lib/node/NodeEnvironmentPlugin.js b/lib/node/NodeEnvironmentPlugin.js
index ba1d7e3cc..6bcd02748 100644
--- a/lib/node/NodeEnvironmentPlugin.js
+++ b/lib/node/NodeEnvironmentPlugin.js
@@ -6,7 +6,6 @@
 "use strict";
 
 const CachedInputFileSystem = require("enhanced-resolve/lib/CachedInputFileSystem");
-const NodeJsInputFileSystem = require("enhanced-resolve/lib/NodeJsInputFileSystem");
 const fs = require("graceful-fs");
 const NodeWatchFileSystem = require("./NodeWatchFileSystem");
 
@@ -18,10 +17,7 @@ class NodeEnvironmentPlugin {
 	 * @returns {void}
 	 */
 	apply(compiler) {
-		compiler.inputFileSystem = new CachedInputFileSystem(
-			new NodeJsInputFileSystem(),
-			60000
-		);
+		compiler.inputFileSystem = new CachedInputFileSystem(fs, 60000);
 		const inputFileSystem = compiler.inputFileSystem;
 		compiler.outputFileSystem = fs;
 		compiler.intermediateFileSystem = fs;
diff --git a/lib/stats/DefaultStatsFactoryPlugin.js b/lib/stats/DefaultStatsFactoryPlugin.js
index 1ad15f38f..6a433e0d3 100644
--- a/lib/stats/DefaultStatsFactoryPlugin.js
+++ b/lib/stats/DefaultStatsFactoryPlugin.js
@@ -135,7 +135,6 @@ const EXTRACT_ERROR = {
 		if (typeof error !== "string") {
 			object.details = error.details;
 			object.stack = error.stack;
-			object.missing = error.missing;
 		}
 	}
 };
diff --git a/lib/stats/DefaultStatsPrinterPlugin.js b/lib/stats/DefaultStatsPrinterPlugin.js
index 7859effb9..61ab1bf0b 100644
--- a/lib/stats/DefaultStatsPrinterPlugin.js
+++ b/lib/stats/DefaultStatsPrinterPlugin.js
@@ -393,7 +393,6 @@ const SIMPLE_PRINTERS = {
 	"error.message": (message, { bold }) => bold(message),
 	"error.details": details => details,
 	"error.stack": stack => stack,
-	"error.missing[]": missing => `[${missing}]`,
 	"error.moduleTrace": moduleTrace => undefined,
 	"error.separator!": () => "\n",
 
diff --git a/package.json b/package.json
index 35922e953..754316520 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "ajv": "^6.1.0",
     "ajv-keywords": "^3.1.0",
     "chrome-trace-event": "^1.0.0",
-    "enhanced-resolve": "^4.1.0",
+    "enhanced-resolve": "5.0.0-beta.0",
     "eslint-scope": "^4.0.0",
     "events": "^3.0.0",
     "find-cache-dir": "^2.1.0",
@@ -23,12 +23,11 @@
     "json-parse-better-errors": "^1.0.2",
     "loader-runner": "3.0.0",
     "loader-utils": "^1.1.0",
-    "memory-fs": "~0.4.1",
     "neo-async": "^2.6.0",
     "schema-utils": "^1.0.0",
     "tapable": "2.0.0-beta.5",
     "terser-webpack-plugin": "^1.2.1",
-    "watchpack": "2.0.0-beta.5",
+    "watchpack": "2.0.0-beta.6",
     "webpack-sources": "2.0.0-beta.1"
   },
   "devDependencies": {
@@ -58,6 +57,7 @@
     "less-loader": "^4.0.3",
     "lint-staged": "^8.0.4",
     "lodash": "^4.17.4",
+    "memory-fs": "~0.4.1",
     "mkdirp": "^0.5.1",
     "prettier": "^1.14.3",
     "pretty-format": "24.0.0",
diff --git a/schemas/WebpackOptions.json b/schemas/WebpackOptions.json
index 8e7ca1286..72ead08bc 100644
--- a/schemas/WebpackOptions.json
+++ b/schemas/WebpackOptions.json
@@ -1310,10 +1310,6 @@
           "description": "Enforce using one of the extensions from the extensions option",
           "type": "boolean"
         },
-        "enforceModuleExtension": {
-          "description": "Enforce using one of the module extensions from the moduleExtensions option",
-          "type": "boolean"
-        },
         "extensions": {
           "description": "Extensions added to the request when trying to find the file",
           "anyOf": [
@@ -1341,14 +1337,6 @@
             }
           ]
         },
-        "moduleExtensions": {
-          "description": "Extensions added to the module request when trying to find the module",
-          "anyOf": [
-            {
-              "$ref": "#/definitions/ArrayOfStringValues"
-            }
-          ]
-        },
         "modules": {
           "description": "Folder names or directory paths where to find modules",
           "anyOf": [
diff --git a/yarn.lock b/yarn.lock
index ff6aa9bfc..d793e2eb5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1596,14 +1596,13 @@ end-of-stream@^1.0.0, end-of-stream@^1.1.0:
   dependencies:
     once "^1.4.0"
 
-enhanced-resolve@^4.1.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/enhanced-resolve/-/enhanced-resolve-4.1.0.tgz#41c7e0bfdfe74ac1ffe1e57ad6a5c6c9f3742a7f"
-  integrity sha512-F/7vkyTtyc/llOIn8oWclcB25KdRaiPBpZYDgJHgh/UHtpgT2p2eldQgtQnLtUvfMKPKxbRaQM/hHkvLHt1Vng==
+enhanced-resolve@5.0.0-beta.0:
+  version "5.0.0-beta.0"
+  resolved "https://registry.yarnpkg.com/enhanced-resolve/-/enhanced-resolve-5.0.0-beta.0.tgz#7635594f4f38a515ba3a5a93498556828964d3ac"
+  integrity sha512-s0jFC1SvF64ZDMdJfkSATGvQPaXjOq49PJHEvodqUiY7pCMRzHjfQgTkTM+Nxpg29ym9ASjEPSiHqo1trqvVEA==
   dependencies:
-    graceful-fs "^4.1.2"
-    memory-fs "^0.4.0"
-    tapable "^1.0.0"
+    graceful-fs "^4.2.0"
+    tapable "^2.0.0-beta"
 
 errno@^0.1.1, errno@^0.1.3, errno@~0.1.7:
   version "0.1.7"
@@ -2259,10 +2258,10 @@ globby@^6.1.0:
     pify "^2.0.0"
     pinkie-promise "^2.0.0"
 
-graceful-fs@^4.1.11, graceful-fs@^4.1.15, graceful-fs@^4.1.2:
-  version "4.1.15"
-  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.15.tgz#ffb703e1066e8a0eeaa4c8b80ba9253eeefbfb00"
-  integrity sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA==
+graceful-fs@^4.1.11, graceful-fs@^4.1.15, graceful-fs@^4.1.2, graceful-fs@^4.2.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.0.tgz#8d8fdc73977cb04104721cb53666c1ca64cd328b"
+  integrity sha512-jpSvDPV4Cq/bgtpndIWbI5hmYxhQGHPC4d4cqBPb4DLniCfhJokdXhwhaDuLBGLQdvvRum/UiX6ECVIPvDXqdg==
 
 "growl@~> 1.10.0":
   version "1.10.5"
@@ -3698,7 +3697,7 @@ memoizee@^0.4.14:
     next-tick "1"
     timers-ext "^0.1.5"
 
-memory-fs@^0.4.0, memory-fs@~0.4.1:
+memory-fs@~0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/memory-fs/-/memory-fs-0.4.1.tgz#3a9a20b8462523e447cfbc7e8bb80ed667bfc552"
   integrity sha1-OpoguEYlI+RHz7x+i7gO1me/xVI=
@@ -5342,16 +5341,11 @@ table@^5.2.3:
     slice-ansi "^2.1.0"
     string-width "^3.0.0"
 
-tapable@2.0.0-beta.5:
+tapable@2.0.0-beta.5, tapable@^2.0.0-beta:
   version "2.0.0-beta.5"
   resolved "https://registry.yarnpkg.com/tapable/-/tapable-2.0.0-beta.5.tgz#51def4d94c58ad8fadf00cac7661216502fe9c70"
   integrity sha512-P4o84kC8CD66ZuCs6noh3QLU2ZuaBvMl0yCmp9rr0GXZyIfLd1sB2ZvJZjitQgfds8GDKRLmiiAcssr2bEHQ0A==
 
-tapable@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/tapable/-/tapable-1.1.0.tgz#0d076a172e3d9ba088fd2272b2668fb8d194b78c"
-  integrity sha512-IlqtmLVaZA2qab8epUXbVWRn3aB1imbDMJtjB3nu4X0NqPkcY/JH9ZtCBWKHWPxs8Svi9tyo8w2dBoi07qZbBA==
-
 terser-webpack-plugin@^1.2.1:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/terser-webpack-plugin/-/terser-webpack-plugin-1.3.0.tgz#69aa22426299f4b5b3775cbed8cb2c5d419aa1d4"
@@ -5703,10 +5697,10 @@ wast-loader@^1.5.5:
   dependencies:
     wabt "1.0.0-nightly.20180421"
 
-watchpack@2.0.0-beta.5:
-  version "2.0.0-beta.5"
-  resolved "https://registry.yarnpkg.com/watchpack/-/watchpack-2.0.0-beta.5.tgz#c005db39570d81d9d34334870abc0f548901b880"
-  integrity sha512-HGqh9e9QZFhow8JYX+1+E+kIYK0uTTsk6rCOkI0ff0f9kMO0wX783yW8saQC9WDx7qHpVGPXsRnld9nY7iwzQA==
+watchpack@2.0.0-beta.6:
+  version "2.0.0-beta.6"
+  resolved "https://registry.yarnpkg.com/watchpack/-/watchpack-2.0.0-beta.6.tgz#19dcb5bfebd2c580b05ed8991140b3fb46ab449c"
+  integrity sha512-CUtzBZ/aFrhsBPs1SJKWpaVG09mRC1ChCL8YZnR/uZf8IPddG7PcdUIGRnDb3yqaCYSyt23u/UxQUGKxGp0rDA==
   dependencies:
     glob-to-regexp "^0.4.1"
     graceful-fs "^4.1.2"