diff --git a/package-lock.json b/package-lock.json
index 2b615e3..958a7be 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -18,7 +18,7 @@
         "@tact-lang/compiler": "^1.5.3",
         "@ton-community/func-js": "^0.5.0",
         "@ton/core": "^0.56.3",
-        "@ton/sandbox": "^0.16.0",
+        "@ton/sandbox": "^0.20.0",
         "@ton/ton": "^13.11.1",
         "@tonconnect/ui-react": "1.0.0-beta.4",
         "@types/node": "18.14.0",
@@ -1386,7 +1386,9 @@
       }
     },
     "node_modules/@ton/sandbox": {
-      "version": "0.16.0",
+      "version": "0.20.0",
+      "resolved": "https://registry.npmjs.org/@ton/sandbox/-/sandbox-0.20.0.tgz",
+      "integrity": "sha512-uci6DRDZGW1eu+hHgbVzf4lDTi29PV+5XKPC8ZyYUJaoOtulkHDtgyrfZ1H5QSOVOmUIjHDQhPwLsn1kU51yHw==",
       "license": "MIT",
       "peerDependencies": {
         "@ton/core": ">=0.56.0",
diff --git a/package.json b/package.json
index fb10094..1ccfc5b 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "@tact-lang/compiler": "^1.5.3",
     "@ton-community/func-js": "^0.5.0",
     "@ton/core": "^0.56.3",
-    "@ton/sandbox": "^0.16.0",
+    "@ton/sandbox": "^0.20.0",
     "@ton/ton": "^13.11.1",
     "@tonconnect/ui-react": "1.0.0-beta.4",
     "@types/node": "18.14.0",
diff --git a/src/components/workspace/WorkspaceSidebar/WorkspaceSidebar.tsx b/src/components/workspace/WorkspaceSidebar/WorkspaceSidebar.tsx
index 11f985f..e6f6e4e 100644
--- a/src/components/workspace/WorkspaceSidebar/WorkspaceSidebar.tsx
+++ b/src/components/workspace/WorkspaceSidebar/WorkspaceSidebar.tsx
@@ -35,10 +35,13 @@ const WorkspaceSidebar: FC<Props> = ({ activeMenu, onMenuClicked }) => {
     getSettingStateByKey,
     updateEditorMode,
     toggleExternalMessage,
+    toggleMasterChain,
   } = useSettingAction();
 
   const editorMode = getSettingStateByKey('editorMode');
   const isExternalMessage = getSettingStateByKey('isExternalMessage');
+  const isMasterChainEnabled = getSettingStateByKey('masterchain');
+
   const themeContext = useContext(ThemeContext);
 
   const menuItems: MenuItem[] = [
@@ -96,6 +99,16 @@ const WorkspaceSidebar: FC<Props> = ({ activeMenu, onMenuClicked }) => {
           />
         </Form.Item>
       </div>
+      <div className={s.settingItem}>
+        <Form.Item label="Masterchain" valuePropName="checked">
+          <Switch
+            checked={!!isMasterChainEnabled}
+            onChange={(toggleState) => {
+              toggleMasterChain(toggleState);
+            }}
+          />
+        </Form.Item>
+      </div>
       <div className={s.settingItem}>
         <Form.Item label="Format code on save" valuePropName="checked">
           <Switch
diff --git a/src/hooks/project.hooks.ts b/src/hooks/project.hooks.ts
index 3dc20be..9f9407c 100644
--- a/src/hooks/project.hooks.ts
+++ b/src/hooks/project.hooks.ts
@@ -28,6 +28,7 @@ export function useProjectActions() {
   const { writeFiles, projectFiles } = useProject();
   const { getFile } = useFile();
   const isExternalMessage = getSettingStateByKey('isExternalMessage');
+  const isMasterChainEnabled = getSettingStateByKey('masterchain');
 
   return {
     compileFuncProgram,
@@ -152,6 +153,7 @@ export function useProjectActions() {
         options: {
           debug: isContractDebugEnabled(),
           external: !!isExternalMessage,
+          masterchain: !!isMasterChainEnabled,
         },
       },
       project: fs,
diff --git a/src/hooks/setting.hooks.ts b/src/hooks/setting.hooks.ts
index 18725b2..8728cb4 100644
--- a/src/hooks/setting.hooks.ts
+++ b/src/hooks/setting.hooks.ts
@@ -23,6 +23,7 @@ export function useSettingAction() {
     toggleAutoBuildAndDeploy,
     updateEditorMode,
     toggleExternalMessage,
+    toggleMasterChain,
   };
 
   async function init() {
@@ -110,4 +111,10 @@ export function useSettingAction() {
       isExternalMessage: active,
     });
   }
+
+  function toggleMasterChain(active: boolean = !setting.isExternalMessage) {
+    updateStateByKey({
+      masterchain: active,
+    });
+  }
 }
diff --git a/src/interfaces/setting.interface.ts b/src/interfaces/setting.interface.ts
index 0c65aed..14e1327 100644
--- a/src/interfaces/setting.interface.ts
+++ b/src/interfaces/setting.interface.ts
@@ -6,4 +6,5 @@ export interface SettingInterface {
   editorMode: 'default' | 'vim';
   isExternalMessage?: boolean;
   theme?: 'light' | 'dark';
+  masterchain?: boolean;
 }
diff --git a/src/pages/_app.tsx b/src/pages/_app.tsx
index 862d3b2..73889e1 100644
--- a/src/pages/_app.tsx
+++ b/src/pages/_app.tsx
@@ -39,7 +39,7 @@ export default function App({
                     "jest": "29.6.2",
                     "@ton/core": "^0.56.3",
                     "@ton/test-utils": "0.4.2",
-                    "@ton/sandbox": "^0.15.0"
+                    "@ton/sandbox": "^0.20.0"
                   }
                 }`,
             },