diff --git a/lib/config/presets/internal/custom-managers.spec.ts b/lib/config/presets/internal/custom-managers.spec.ts
index fb2cf741119..aab2ba65243 100644
--- a/lib/config/presets/internal/custom-managers.spec.ts
+++ b/lib/config/presets/internal/custom-managers.spec.ts
@@ -809,7 +809,7 @@ describe('config/presets/internal/custom-managers', () => {
   describe('Update `tsconfig/node` version in tsconfig.json', () => {
     const customManager = presets.tsconfigNodeVersions.customManagers?.[0];
 
-    it(`find dependencies in file`, async () => {
+    it(`find in tsconfig.json extends string`, async () => {
       const fileContent = codeBlock`
         {
             "extends": "@tsconfig/node20/tsconfig.json",
@@ -833,6 +833,33 @@ describe('config/presets/internal/custom-managers', () => {
       ]);
     });
 
+    it(`find in tsconfig.json extends array`, async () => {
+      const fileContent = codeBlock`
+        {
+            "extends": [
+              "@tsconfig/strictest/tsconfig.json",
+              "@tsconfig/node20/tsconfig.json"
+            ],
+            "include": ["src/**/*"]
+        }
+      `;
+
+      const res = await extractPackageFile(
+        'regex',
+        fileContent,
+        'tsconfig.json',
+        customManager!,
+      );
+
+      expect(res?.deps).toMatchObject([
+        {
+          currentValue: '20',
+          datasource: 'npm',
+          depName: '@tsconfig/node20',
+        },
+      ]);
+    });
+
     describe('matches regexes patterns', () => {
       it.each`
         path                   | expected
diff --git a/lib/config/presets/internal/custom-managers.ts b/lib/config/presets/internal/custom-managers.ts
index f1b5aacc141..8f0794d5523 100644
--- a/lib/config/presets/internal/custom-managers.ts
+++ b/lib/config/presets/internal/custom-managers.ts
@@ -150,14 +150,13 @@ export const presets: Record<string, Preset> = {
   tsconfigNodeVersions: {
     customManagers: [
       {
-        autoReplaceStringTemplate:
-          '"extends": "@tsconfig/node{{{major}}}/tsconfig.json"',
+        autoReplaceStringTemplate: '"@tsconfig/node{{{major}}}/tsconfig.json"',
         currentValueTemplate: '{{{major}}}',
         customType: 'regex',
         datasourceTemplate: 'npm',
         managerFilePatterns: ['**/tsconfig.json'],
         matchStrings: [
-          '"extends":\\s*"(?<depName>@tsconfig/node(?<major>\\d+))/tsconfig\\.json"',
+          '"(?<depName>@tsconfig/node(?<major>\\d+))/tsconfig\\.json"',
         ],
       },
     ],