diff --git a/src/vs/workbench/api/browser/mainThreadQuickOpen.ts b/src/vs/workbench/api/browser/mainThreadQuickOpen.ts
index a44c01c215b..78f8439bf22 100644
--- a/src/vs/workbench/api/browser/mainThreadQuickOpen.ts
+++ b/src/vs/workbench/api/browser/mainThreadQuickOpen.ts
@@ -174,13 +174,13 @@ export class MainThreadQuickOpen implements MainThreadQuickOpenShape {
 				params[param].forEach((item: TransferQuickPickItems) => {
 					handlesToItems.set(item.handle, item);
 				});
-				input[param] = params[param];
+				(input as any)[param] = params[param];
 			} else if (param === 'activeItems' || param === 'selectedItems') {
-				input[param] = params[param]
+				(input as any)[param] = params[param]
 					.filter((handle: number) => handlesToItems.has(handle))
 					.map((handle: number) => handlesToItems.get(handle));
 			} else if (param === 'buttons') {
-				input[param] = params.buttons!.map(button => {
+				(input as any)[param] = params.buttons!.map(button => {
 					if (button.handle === -1) {
 						return this._quickInputService.backButton;
 					}
@@ -195,7 +195,7 @@ export class MainThreadQuickOpen implements MainThreadQuickOpenShape {
 					};
 				});
 			} else {
-				input[param] = params[param];
+				(input as any)[param] = params[param];
 			}
 		}
 		return Promise.resolve(undefined);
diff --git a/src/vs/workbench/api/common/extHost.protocol.ts b/src/vs/workbench/api/common/extHost.protocol.ts
index 6b747ffac41..b702c64c2da 100644
--- a/src/vs/workbench/api/common/extHost.protocol.ts
+++ b/src/vs/workbench/api/common/extHost.protocol.ts
@@ -425,6 +425,8 @@ export type TransferQuickInput = TransferQuickPick | TransferInputBox;
 
 export interface BaseTransferQuickInput {
 
+	[key: string]: any;
+
 	id: number;
 
 	type?: 'quickPick' | 'inputBox';
diff --git a/src/vs/workbench/api/common/extHostQuickOpen.ts b/src/vs/workbench/api/common/extHostQuickOpen.ts
index f4c9f456c13..467b05f5c96 100644
--- a/src/vs/workbench/api/common/extHostQuickOpen.ts
+++ b/src/vs/workbench/api/common/extHostQuickOpen.ts
@@ -458,14 +458,14 @@ function getLightIconUri(iconPath: QuickInputButton['iconPath']) {
 			|| iconPath instanceof URI) {
 			return getIconUri(iconPath);
 		}
-		return getIconUri(iconPath['light']);
+		return getIconUri((iconPath as any).light);
 	}
 	return undefined;
 }
 
 function getDarkIconUri(iconPath: QuickInputButton['iconPath']) {
-	if (iconPath && !(iconPath instanceof ThemeIcon) && iconPath['dark']) {
-		return getIconUri(iconPath['dark']);
+	if (iconPath && !(iconPath instanceof ThemeIcon) && (iconPath as any).dark) {
+		return getIconUri((iconPath as any).dark);
 	}
 	return undefined;
 }
diff --git a/src/vs/workbench/browser/parts/quickinput/quickInputList.ts b/src/vs/workbench/browser/parts/quickinput/quickInputList.ts
index 7f779285752..a3de4f70c07 100644
--- a/src/vs/workbench/browser/parts/quickinput/quickInputList.ts
+++ b/src/vs/workbench/browser/parts/quickinput/quickInputList.ts
@@ -456,7 +456,7 @@ export class QuickInputList {
 			what = 'Last';
 		}
 
-		this.list['focus' + what]();
+		(this.list as any)['focus' + what]();
 		this.list.reveal(this.list.getFocus()[0]);
 	}
 
diff --git a/src/vs/workbench/browser/parts/quickinput/quickInputUtils.ts b/src/vs/workbench/browser/parts/quickinput/quickInputUtils.ts
index babe9495114..3ea185f4750 100644
--- a/src/vs/workbench/browser/parts/quickinput/quickInputUtils.ts
+++ b/src/vs/workbench/browser/parts/quickinput/quickInputUtils.ts
@@ -8,7 +8,7 @@ import * as dom from 'vs/base/browser/dom';
 import { URI } from 'vs/base/common/uri';
 import { IdGenerator } from 'vs/base/common/idGenerator';
 
-const iconPathToClass = {};
+const iconPathToClass: Record<string, string> = {};
 const iconClassGenerator = new IdGenerator('quick-input-button-icon-');
 
 export function getIconClass(iconPath: { dark: URI; light?: URI; } | undefined): string | undefined {