diff --git a/CHANGELOG.md b/CHANGELOG.md
index d01e94f0..938d727d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -49,6 +49,7 @@ Also want to check the development status, check the [commit history](https://gi
 * [#255](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/255) Objects with child elements in index notation such as `["a & -"]` may get stuck when retrieving child elements
 * [#256](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/256) v2 only bug. If double/single quotes are used in #Include directive, they do not appear in Loaded Scripts
 * [#262](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/262) If runtime is v2, it may be aborted with an error when attaching
+* [#285](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/285) The `extends` attribute in launch.json does not work in the multi-root workspace and throws an error
 
 ## [1.11.0] - 2022-02-11
 ### Added
diff --git a/README.md b/README.md
index f9b56ecf..becfcd24 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,7 @@ This extension is a debugger adapter for [VSCode](https://code.visualstudio.com/
     * Fixed: [#255](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/255) Objects with child elements in index notation such as `["a & -"]` may get stuck when retrieving child elements
     * Fixed: [#256](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/256) v2 only bug. If double/single quotes are used in #Include directive, they do not appear in Loaded Scripts
     * Fixed: [#262](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/262) If runtime is v2, it may be aborted with an error when attaching
+    * Fixed: [#285](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/285) The `extends` attribute in launch.json does not work in the multi-root workspace and throws an error
 
 * `1.11.0` - 2022-02-11
     * Added: [#201](https://github.com/zero-plusplus/vscode-autohotkey-debug/issues/201) Add `useLoadedScripts` to launch.json
diff --git a/package-lock.json b/package-lock.json
index 9dbfdcb9..01a6a5e0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,6 +16,7 @@
         "fast-glob": "^3.2.7",
         "fast-xml-parser": "^3.16.0",
         "he": "^1.2.0",
+        "jsonc-parser": "^3.2.0",
         "lazy-promise": "^4.0.0",
         "lodash": "^4.17.20",
         "matcher": "^4.0.0",
@@ -5451,10 +5452,9 @@
       }
     },
     "node_modules/jsonc-parser": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/jsonc-parser/-/jsonc-parser-3.0.0.tgz",
-      "integrity": "sha512-fQzRfAbIBnR0IQvftw9FJveWiHp72Fg20giDrHz6TdfB12UH/uue0D3hm57UB5KgAVuniLMCaS8P1IMj9NR7cA==",
-      "dev": true
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/jsonc-parser/-/jsonc-parser-3.2.0.tgz",
+      "integrity": "sha512-gfFQZrcTc8CnKXp6Y4/CBT3fTc0OVuDofpre4aEeEpSBPV5X5v4+Vmx+8snU7RLPrNHPKSgLxGo9YuQzz20o+w=="
     },
     "node_modules/jsonfile": {
       "version": "6.1.0",
@@ -11814,10 +11814,9 @@
       "dev": true
     },
     "jsonc-parser": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/jsonc-parser/-/jsonc-parser-3.0.0.tgz",
-      "integrity": "sha512-fQzRfAbIBnR0IQvftw9FJveWiHp72Fg20giDrHz6TdfB12UH/uue0D3hm57UB5KgAVuniLMCaS8P1IMj9NR7cA==",
-      "dev": true
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/jsonc-parser/-/jsonc-parser-3.2.0.tgz",
+      "integrity": "sha512-gfFQZrcTc8CnKXp6Y4/CBT3fTc0OVuDofpre4aEeEpSBPV5X5v4+Vmx+8snU7RLPrNHPKSgLxGo9YuQzz20o+w=="
     },
     "jsonfile": {
       "version": "6.1.0",
diff --git a/package.json b/package.json
index 278577f8..23e179e5 100644
--- a/package.json
+++ b/package.json
@@ -1491,6 +1491,7 @@
     "fast-glob": "^3.2.7",
     "fast-xml-parser": "^3.16.0",
     "he": "^1.2.0",
+    "jsonc-parser": "^3.2.0",
     "lazy-promise": "^4.0.0",
     "lodash": "^4.17.20",
     "matcher": "^4.0.0",
diff --git a/src/extension.ts b/src/extension.ts
index cc399911..621a1565 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -2,9 +2,10 @@
 /* eslint-disable @typescript-eslint/no-unsafe-argument */
 /* eslint-disable @typescript-eslint/no-unsafe-assignment */
 /* eslint-disable require-atomic-updates */
-import { existsSync } from 'fs';
+import { existsSync, readFileSync } from 'fs';
 import * as path from 'path';
 import * as vscode from 'vscode';
+import JSONC from 'jsonc-parser';
 import { defaults, groupBy, isString, range } from 'lodash';
 import tcpPortUsed from 'tcp-port-used';
 import { getAhkVersion } from './util/getAhkVersion';
@@ -134,7 +135,10 @@ export class AhkConfigurationProvider implements vscode.DebugConfigurationProvid
   public config?: LaunchRequestArguments;
   public resolveDebugConfiguration(folder: vscode.WorkspaceFolder | undefined, config: vscode.DebugConfiguration, token?: vscode.CancellationToken): vscode.ProviderResult<vscode.DebugConfiguration> {
     if (config.extends) {
-      const launch = vscode.workspace.getConfiguration().get<Record<string, any>>('launch');
+      const launch = folder
+        ? JSONC.parse(readFileSync(path.resolve(folder.uri.fsPath, '.vscode', 'launch.json'), 'utf-8'))
+        : vscode.workspace.getConfiguration().get<Record<string, any>>('launch');
+
       if (launch && 'configurations' in launch && Array.isArray(launch.configurations)) {
         const sourceConfig = launch.configurations.find((conf) => equalsIgnoreCase(conf.name, config.extends));
         if (!sourceConfig) {