diff --git a/lib/utils/addEntries.js b/lib/utils/addEntries.js
index 7eaac33003..7fdccf47e6 100644
--- a/lib/utils/addEntries.js
+++ b/lib/utils/addEntries.js
@@ -117,15 +117,24 @@ function addEntries(config, options, server) {
 
     // eslint-disable-next-line no-shadow
     [].concat(config).forEach((config) => {
+      // In webpack v5 target can be a string, an array of strings, null, or undefined
+      /** @type {Array<string>} */
+      const targets = Array.isArray(config.target)
+        ? config.target
+        : [config.target];
+
       /** @type {Boolean} */
-      const webTarget = [
-        'web',
-        'webworker',
-        'electron-renderer',
-        'node-webkit',
-        undefined, // eslint-disable-line
-        null,
-      ].includes(config.target);
+      const webTarget = targets.some((target) => {
+        return [
+          'web',
+          'webworker',
+          'electron-renderer',
+          'node-webkit',
+          undefined, // eslint-disable-line
+          null,
+        ].includes(target);
+      });
+
       /** @type {Entry} */
       const additionalEntries = checkInject(
         options.injectClient,
diff --git a/test/server/utils/addEntries.test.js b/test/server/utils/addEntries.test.js
index a5a375da2a..70b951154d 100644
--- a/test/server/utils/addEntries.test.js
+++ b/test/server/utils/addEntries.test.js
@@ -307,9 +307,11 @@ describe('addEntries util', () => {
       Object.assign({}, config),
       Object.assign({ target: 'web' }, config),
       Object.assign({ target: 'webworker' }, config),
+      Object.assign({ target: ['web', 'webworker'] }, config),
+      Object.assign({ target: ['web', 'es5'] }, config),
       Object.assign({ target: 'electron-renderer' }, config),
       Object.assign({ target: 'node-webkit' }, config),
-      Object.assign({ target: 'node' }, config) /* index:5 */,
+      Object.assign({ target: 'node' }, config) /* index:7 */,
     ];
 
     const devServerOptions = {};
@@ -318,7 +320,7 @@ describe('addEntries util', () => {
 
     // eslint-disable-next-line no-shadow
     webpackOptions.forEach((webpackOptions, index) => {
-      const expectInline = index !== 5; /* all but the node target */
+      const expectInline = index !== 7; /* all but the node target */
 
       expect(webpackOptions.entry.length).toEqual(expectInline ? 2 : 1);