diff --git a/CHANGELOG.md b/CHANGELOG.md
index 70063d64..d5890870 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+### [2.4.1](https://github.com/webpack-contrib/mini-css-extract-plugin/compare/v2.4.0...v2.4.1) (2021-10-05)
+
+
+### Bug Fixes
+
+* crash with multiple webpack versions ([#845](https://github.com/webpack-contrib/mini-css-extract-plugin/issues/845)) ([b4431cb](https://github.com/webpack-contrib/mini-css-extract-plugin/commit/b4431cb60a6eadcf8c2b614f494faf899c73aaa0))
+
 ## [2.4.0](https://github.com/webpack-contrib/mini-css-extract-plugin/compare/v2.3.0...v2.4.0) (2021-10-05)
 
 ### Performance
diff --git a/package-lock.json b/package-lock.json
index ec2732e0..721cd845 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "mini-css-extract-plugin",
-  "version": "2.4.0",
+  "version": "2.4.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "mini-css-extract-plugin",
-      "version": "2.4.0",
+      "version": "2.4.1",
       "license": "MIT",
       "dependencies": {
         "schema-utils": "^3.1.0"
diff --git a/package.json b/package.json
index 495d1890..2188632c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mini-css-extract-plugin",
-  "version": "2.4.0",
+  "version": "2.4.1",
   "description": "extracts CSS into separate files",
   "license": "MIT",
   "repository": "webpack-contrib/mini-css-extract-plugin",
diff --git a/src/index.js b/src/index.js
index 467853a8..9a1b17de 100644
--- a/src/index.js
+++ b/src/index.js
@@ -2,8 +2,6 @@
 
 import { validate } from "schema-utils";
 
-import { getUndoPath } from "webpack/lib/util/identifier";
-
 import schema from "./plugin-options.json";
 import {
   trueFn,
@@ -12,6 +10,7 @@ import {
   ABSOLUTE_PUBLIC_PATH,
   SINGLE_DOT_PATH_SEGMENT,
   compareModulesByIdentifier,
+  getUndoPath,
 } from "./utils";
 
 export const pluginName = "mini-css-extract-plugin";
diff --git a/src/utils.js b/src/utils.js
index f69456b6..ea569c45 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -102,6 +102,45 @@ function stringifyRequest(loaderContext, request) {
   );
 }
 
+function getUndoPath(filename, outputPath, enforceRelative) {
+  let depth = -1;
+  let append = "";
+
+  // eslint-disable-next-line no-param-reassign
+  outputPath = outputPath.replace(/[\\/]$/, "");
+
+  for (const part of filename.split(/[/\\]+/)) {
+    if (part === "..") {
+      if (depth > -1) {
+        // eslint-disable-next-line no-plusplus
+        depth--;
+      } else {
+        const i = outputPath.lastIndexOf("/");
+        const j = outputPath.lastIndexOf("\\");
+        const pos = i < 0 ? j : j < 0 ? i : Math.max(i, j);
+
+        if (pos < 0) {
+          return `${outputPath}/`;
+        }
+
+        append = `${outputPath.slice(pos + 1)}/${append}`;
+
+        // eslint-disable-next-line no-param-reassign
+        outputPath = outputPath.slice(0, pos);
+      }
+    } else if (part !== ".") {
+      // eslint-disable-next-line no-plusplus
+      depth++;
+    }
+  }
+
+  return depth > 0
+    ? `${"../".repeat(depth)}${append}`
+    : enforceRelative
+    ? `./${append}`
+    : append;
+}
+
 export {
   trueFn,
   findModuleById,
@@ -112,4 +151,5 @@ export {
   ABSOLUTE_PUBLIC_PATH,
   SINGLE_DOT_PATH_SEGMENT,
   stringifyRequest,
+  getUndoPath,
 };