diff --git a/core/webpack.test.js b/core/webpack.test.js
index 024348fe879..f87d8bd9d92 100644
--- a/core/webpack.test.js
+++ b/core/webpack.test.js
@@ -1,4 +1,4 @@
-/*
+/**
  * @copyright 2018 Christoph Wurst <christoph@winzerhof-wurst.at>
  *
  * @author 2018 Christoph Wurst <christoph@winzerhof-wurst.at>
@@ -19,7 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-const merge = require('webpack-merge');
+const { merge } = require('webpack-merge');
 const common = require('./webpack.js');
 // webpack.config.js
 const nodeExternals = require('webpack-node-externals')
diff --git a/package-lock.json b/package-lock.json
index 534f190ec28..bfc33cc5fba 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5746,6 +5746,17 @@
         "wrap-ansi": "^5.1.0"
       }
     },
+    "clone-deep": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/clone-deep/-/clone-deep-4.0.1.tgz",
+      "integrity": "sha512-neHB9xuzh/wk0dIHweyAXv2aPGZIVk3pLMe+/RNzINf17fe0OG96QroktYAUm7SM1PBnzTabaLboqqxDyMU+SQ==",
+      "dev": true,
+      "requires": {
+        "is-plain-object": "^2.0.4",
+        "kind-of": "^6.0.2",
+        "shallow-clone": "^3.0.0"
+      }
+    },
     "code-point-at": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/code-point-at/-/code-point-at-1.1.0.tgz",
@@ -11838,6 +11849,15 @@
         "safe-buffer": "^5.0.1"
       }
     },
+    "shallow-clone": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/shallow-clone/-/shallow-clone-3.0.1.tgz",
+      "integrity": "sha512-/6KqX+GVUdqPuPPd2LxDDxzX6CAbjJehAAOKlNpqqUpAqPM6HeL8f+o3a+JsyGjn2lv0WY8UsTgUJjU9Ok55NA==",
+      "dev": true,
+      "requires": {
+        "kind-of": "^6.0.2"
+      }
+    },
     "shebang-command": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-1.2.0.tgz",
@@ -13459,12 +13479,13 @@
       }
     },
     "webpack-merge": {
-      "version": "4.2.2",
-      "resolved": "https://registry.npmjs.org/webpack-merge/-/webpack-merge-4.2.2.tgz",
-      "integrity": "sha512-TUE1UGoTX2Cd42j3krGYqObZbOD+xF7u28WB7tfUordytSjbWTIjK/8V0amkBfTYN4/pB/GIDlJZZ657BGG19g==",
+      "version": "5.0.9",
+      "resolved": "https://registry.npmjs.org/webpack-merge/-/webpack-merge-5.0.9.tgz",
+      "integrity": "sha512-P4teh6O26xIDPugOGX61wPxaeP918QOMjmzhu54zTVcLtOS28ffPWtnv+ilt3wscwBUCL2WNMnh97XkrKqt9Fw==",
       "dev": true,
       "requires": {
-        "lodash": "^4.17.15"
+        "clone-deep": "^4.0.1",
+        "wildcard": "^2.0.0"
       }
     },
     "webpack-node-externals": {
@@ -13567,6 +13588,12 @@
         }
       }
     },
+    "wildcard": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/wildcard/-/wildcard-2.0.0.tgz",
+      "integrity": "sha512-JcKqAHLPxcdb9KM49dufGXn2x3ssnfjbcaQdLlfZsL9rH9wgDQjUtDxbo8NE0F6SFvydeu1VhZe7hZuHsB2/pw==",
+      "dev": true
+    },
     "word-wrap": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
diff --git a/package.json b/package.json
index 6e24895c93c..0d4906b3f96 100644
--- a/package.json
+++ b/package.json
@@ -120,7 +120,7 @@
     "vue-template-compiler": "^2.6.11",
     "webpack": "^4.43.0",
     "webpack-cli": "^3.3.12",
-    "webpack-merge": "^4.2.2",
+    "webpack-merge": "^5.0.9",
     "webpack-node-externals": "^1.7.2"
   },
   "browserslist": [
diff --git a/webpack.common.js b/webpack.common.js
index d03617d77d8..d304828e578 100644
--- a/webpack.common.js
+++ b/webpack.common.js
@@ -1,6 +1,6 @@
 /* eslint-disable camelcase */
 const path = require('path')
-const merge = require('webpack-merge')
+const { merge } = require('webpack-merge')
 const { VueLoaderPlugin } = require('vue-loader')
 
 const accessibility = require('./apps/accessibility/webpack')
diff --git a/webpack.dev.js b/webpack.dev.js
index 8de803b5683..95b82b823a4 100644
--- a/webpack.dev.js
+++ b/webpack.dev.js
@@ -1,4 +1,4 @@
-const merge = require('webpack-merge');
+const { merge } = require('webpack-merge');
 const common = require('./webpack.common.js');
 
 module.exports = common.map(
diff --git a/webpack.prod.js b/webpack.prod.js
index 02f21f80ced..9a2477e7d70 100644
--- a/webpack.prod.js
+++ b/webpack.prod.js
@@ -1,4 +1,4 @@
-const merge = require('webpack-merge')
+const { merge } = require('webpack-merge')
 const common = require('./webpack.common.js')
 const TerserPlugin = require('terser-webpack-plugin');