diff --git a/build/package.json b/build/package.json
index c52a03b2c42..6f9ebb5b34b 100644
--- a/build/package.json
+++ b/build/package.json
@@ -43,7 +43,7 @@
     "minimist": "^1.2.0",
     "request": "^2.85.0",
     "terser": "4.3.8",
-    "typescript": "3.8.0-dev.20200128",
+    "typescript": "^3.8.1-rc",
     "vsce": "1.48.0",
     "vscode-telemetry-extractor": "^1.5.4",
     "xml2js": "^0.4.17"
diff --git a/build/yarn.lock b/build/yarn.lock
index 61edbef5565..ee1e7bfb294 100644
--- a/build/yarn.lock
+++ b/build/yarn.lock
@@ -2453,16 +2453,16 @@ typed-rest-client@^0.9.0:
     tunnel "0.0.4"
     underscore "1.8.3"
 
-typescript@3.8.0-dev.20200128:
-  version "3.8.0-dev.20200128"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.0-dev.20200128.tgz#4eedbd3547326f2e9cb826c4144800eb93c81866"
-  integrity sha512-tXJMyrE3xhLDzCN76wZhoV8S1AU5JH40DzrLBAZWfHOgH8X8mCHFwyJ8U6N929vBL78rHmEcowyioUr09/Xvjg==
-
 typescript@^3.0.1:
   version "3.5.3"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.5.3.tgz#c830f657f93f1ea846819e929092f5fe5983e977"
   integrity sha512-ACzBtm/PhXBDId6a6sDJfroT2pOWt/oOnk4/dElG5G33ZL776N3Y6/6bKZJBFpd+b05F3Ct9qDjMeJmRWtE2/g==
 
+typescript@^3.8.1-rc:
+  version "3.8.1-rc"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.1-rc.tgz#f94333c14da70927ccd887be2e91be652a9a09f6"
+  integrity sha512-aOIe066DyZn2uYIiND6fXMUUJ70nxwu/lKhA92QuQzXyC86fr0ywo1qvO8l2m0EnDcfjprYPuFRgNgDj7U2GlQ==
+
 typical@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/typical/-/typical-4.0.0.tgz#cbeaff3b9d7ae1e2bbfaf5a4e6f11eccfde94fc4"
diff --git a/extensions/package.json b/extensions/package.json
index 1e42a54acdb..df820979f1a 100644
--- a/extensions/package.json
+++ b/extensions/package.json
@@ -3,7 +3,7 @@
   "version": "0.0.1",
   "description": "Dependencies shared by all extensions",
   "dependencies": {
-    "typescript": "^3.8.0-dev.20200201"
+    "typescript": "^3.8.1-rc"
   },
   "scripts": {
     "postinstall": "node ./postinstall"
diff --git a/extensions/yarn.lock b/extensions/yarn.lock
index 7c7f1ef6e52..1d6447cfe6d 100644
--- a/extensions/yarn.lock
+++ b/extensions/yarn.lock
@@ -2,7 +2,7 @@
 # yarn lockfile v1
 
 
-typescript@^3.8.0-dev.20200201:
-  version "3.8.0-dev.20200201"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.0-dev.20200201.tgz#e03210f5c7915f89cb77bd38793d12a69933a1a6"
-  integrity sha512-KhaK6J3dIg6p9t24UVhBLcBIav4MpMExlD6nf18cVwp9LELuqhWu0NDmnLdSN0ovsrbcIJNmobQ1xC7vLN21eg==
+typescript@^3.8.1-rc:
+  version "3.8.1-rc"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.1-rc.tgz#f94333c14da70927ccd887be2e91be652a9a09f6"
+  integrity sha512-aOIe066DyZn2uYIiND6fXMUUJ70nxwu/lKhA92QuQzXyC86fr0ywo1qvO8l2m0EnDcfjprYPuFRgNgDj7U2GlQ==
diff --git a/package.json b/package.json
index e5da56c97a7..3d1cc66c15d 100644
--- a/package.json
+++ b/package.json
@@ -147,7 +147,7 @@
     "sinon": "^1.17.2",
     "source-map": "^0.4.4",
     "ts-loader": "^4.4.2",
-    "typescript": "3.8.0-dev.20200128",
+    "typescript": "^3.8.1-rc",
     "typescript-formatter": "7.1.0",
     "underscore": "^1.8.2",
     "vinyl": "^2.0.0",
diff --git a/src/vs/platform/progress/common/progress.ts b/src/vs/platform/progress/common/progress.ts
index 49c827f2bbc..2b7e3b8b385 100644
--- a/src/vs/platform/progress/common/progress.ts
+++ b/src/vs/platform/progress/common/progress.ts
@@ -17,7 +17,7 @@ export interface IProgressService {
 
 	_serviceBrand: undefined;
 
-	withProgress<R = any>(options: IProgressOptions | IProgressNotificationOptions | IProgressWindowOptions | IProgressCompositeOptions, task: (progress: IProgress<IProgressStep>) => Promise<R>, onDidCancel?: () => void): Promise<R>;
+	withProgress<R = any>(options: IProgressOptions | IProgressNotificationOptions | IProgressWindowOptions | IProgressCompositeOptions, task: (progress: IProgress<IProgressStep>) => Promise<R>, onDidCancel?: (choice?: number) => void): Promise<R>;
 }
 
 export interface IProgressIndicator {
diff --git a/src/vs/workbench/contrib/remote/browser/remote.ts b/src/vs/workbench/contrib/remote/browser/remote.ts
index 5feb009f368..493348e749f 100644
--- a/src/vs/workbench/contrib/remote/browser/remote.ts
+++ b/src/vs/workbench/contrib/remote/browser/remote.ts
@@ -636,7 +636,7 @@ class RemoteAgentConnectionStatusListener implements IWorkbenchContribution {
 						(progress) => { if (progressReporter) { progressReporter.currentProgress = progress; } return promise; },
 						(choice?) => {
 							// Handle choice from dialog
-							if (buttons[choice]) {
+							if (typeof choice !== 'undefined' && buttons[choice]) {
 								buttons[choice].callback();
 							} else {
 								showProgress(ProgressLocation.Notification, buttons);
@@ -651,7 +651,7 @@ class RemoteAgentConnectionStatusListener implements IWorkbenchContribution {
 						(progress) => { if (progressReporter) { progressReporter.currentProgress = progress; } return promise; },
 						(choice?) => {
 							// Handle choice from dialog
-							if (buttons[choice]) {
+							if (typeof choice !== 'undefined' && buttons[choice]) {
 								buttons[choice].callback();
 							} else {
 								hideProgress();
diff --git a/yarn.lock b/yarn.lock
index 46a44ea74a6..9938b508e90 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9104,16 +9104,16 @@ typescript-formatter@7.1.0:
     commandpost "^1.0.0"
     editorconfig "^0.15.0"
 
-typescript@3.8.0-dev.20200128:
-  version "3.8.0-dev.20200128"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.0-dev.20200128.tgz#4eedbd3547326f2e9cb826c4144800eb93c81866"
-  integrity sha512-tXJMyrE3xhLDzCN76wZhoV8S1AU5JH40DzrLBAZWfHOgH8X8mCHFwyJ8U6N929vBL78rHmEcowyioUr09/Xvjg==
-
 typescript@^2.6.2:
   version "2.6.2"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.6.2.tgz#3c5b6fd7f6de0914269027f03c0946758f7673a4"
   integrity sha1-PFtv1/beCRQmkCfwPAlGdY92c6Q=
 
+typescript@^3.8.1-rc:
+  version "3.8.1-rc"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.1-rc.tgz#f94333c14da70927ccd887be2e91be652a9a09f6"
+  integrity sha512-aOIe066DyZn2uYIiND6fXMUUJ70nxwu/lKhA92QuQzXyC86fr0ywo1qvO8l2m0EnDcfjprYPuFRgNgDj7U2GlQ==
+
 uc.micro@^1.0.1, uc.micro@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/uc.micro/-/uc.micro-1.0.3.tgz#7ed50d5e0f9a9fb0a573379259f2a77458d50192"