diff --git a/src/vs/code/electron-main/auth.ts b/src/vs/code/electron-main/auth.ts
index e03d4b8a527655a927ce2ce026ae0ba60498ab34..d604782536bd79bc675a5c2a62766330f75b5892 100644
--- a/src/vs/code/electron-main/auth.ts
+++ b/src/vs/code/electron-main/auth.ts
@@ -64,6 +64,7 @@ export class ProxyAuthHandler extends Disposable {
 				sandbox: true,
 				devTools: false,
 				enableRemoteModule: false,
+				spellcheck: false,
 				v8CacheOptions: 'bypassHeatCheck'
 			}
 		};
diff --git a/src/vs/code/electron-main/sharedProcess.ts b/src/vs/code/electron-main/sharedProcess.ts
index d225e6eb31d5b3dfe2fa08b8bfbb4d9fb00262b9..3d8b921d712295f409c9bdcaf8f8a799147347b0 100644
--- a/src/vs/code/electron-main/sharedProcess.ts
+++ b/src/vs/code/electron-main/sharedProcess.ts
@@ -46,6 +46,7 @@ export class SharedProcess implements ISharedProcess {
 				nodeIntegration: true,
 				enableWebSQL: false,
 				enableRemoteModule: false,
+				spellcheck: false,
 				nativeWindowOpen: true,
 				images: false,
 				webgl: false,
diff --git a/src/vs/code/electron-main/window.ts b/src/vs/code/electron-main/window.ts
index c300a83ac0e7b8510ad0de40c46c35e323b5964d..57400e616df3b1b0af13c24e83b0a28c93da5c81 100644
--- a/src/vs/code/electron-main/window.ts
+++ b/src/vs/code/electron-main/window.ts
@@ -170,6 +170,7 @@ export class CodeWindow extends Disposable implements ICodeWindow {
 					nodeIntegration: true,
 					enableWebSQL: false,
 					enableRemoteModule: false,
+					spellcheck: false,
 					nativeWindowOpen: true,
 					webviewTag: true,
 					zoomFactor: zoomLevelToZoomFactor(windowConfig?.zoomLevel)
diff --git a/src/vs/platform/issue/electron-main/issueMainService.ts b/src/vs/platform/issue/electron-main/issueMainService.ts
index 9a333650a30fbaaf9cd15a3861df85bb9f3192de..3621783e893b7ddef9dbf550f1c8799853b161df 100644
--- a/src/vs/platform/issue/electron-main/issueMainService.ts
+++ b/src/vs/platform/issue/electron-main/issueMainService.ts
@@ -199,6 +199,7 @@ export class IssueMainService implements ICommonIssueService {
 							nodeIntegration: true,
 							enableWebSQL: false,
 							enableRemoteModule: false,
+							spellcheck: false,
 							nativeWindowOpen: true,
 							zoomFactor: zoomLevelToZoomFactor(data.zoomLevel)
 						}
@@ -252,6 +253,7 @@ export class IssueMainService implements ICommonIssueService {
 							preload: URI.parse(require.toUrl('vs/base/parts/sandbox/electron-browser/preload.js')).fsPath,
 							enableWebSQL: false,
 							enableRemoteModule: false,
+							spellcheck: false,
 							nativeWindowOpen: true,
 							zoomFactor: zoomLevelToZoomFactor(data.zoomLevel),
 							...this.environmentService.sandbox ?
diff --git a/test/unit/electron/index.js b/test/unit/electron/index.js
index 9d8113f7566716fb88b38bb18673b398331c945e..4c8443c5741036533ba831677bf46a4f2b31e887 100644
--- a/test/unit/electron/index.js
+++ b/test/unit/electron/index.js
@@ -116,6 +116,7 @@ app.on('ready', () => {
 			nodeIntegration: true,
 			enableWebSQL: false,
 			enableRemoteModule: false,
+			spellcheck: false,
 			nativeWindowOpen: true,
 			webviewTag: true
 		}