diff --git a/news/3 Code Health/8395.md b/news/3 Code Health/8395.md
new file mode 100644
index 000000000000..39e916f1767a
--- /dev/null
+++ b/news/3 Code Health/8395.md	
@@ -0,0 +1 @@
+Update TypeScript to `3.7`.
diff --git a/package-lock.json b/package-lock.json
index 39679948ba9d..dee0fb675081 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -18498,9 +18498,9 @@
             }
         },
         "typescript": {
-            "version": "3.6.4",
-            "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.6.4.tgz",
-            "integrity": "sha512-unoCll1+l+YK4i4F8f22TaNVPRHcD9PA3yCuZ8g5e0qGqlVlJ/8FSateOLLSagn+Yg5+ZwuPkL8LFUc0Jcvksg==",
+            "version": "3.7.2",
+            "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
+            "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
             "dev": true
         },
         "typescript-char": {
diff --git a/package.json b/package.json
index 38900e84d328..c8bf7fb8ba13 100644
--- a/package.json
+++ b/package.json
@@ -2896,7 +2896,7 @@
         "tslint-microsoft-contrib": "^5.0.3",
         "typed-react-markdown": "^0.1.0",
         "typemoq": "^2.1.0",
-        "typescript": "^3.6.4",
+        "typescript": "^3.7.2",
         "typescript-formatter": "^7.1.0",
         "unicode-properties": "1.1.0",
         "url-loader": "^1.1.2",
diff --git a/src/client/datascience/jupyter/notebookStarter.ts b/src/client/datascience/jupyter/notebookStarter.ts
index 8133f1ef6f0e..4d64251f1a20 100644
--- a/src/client/datascience/jupyter/notebookStarter.ts
+++ b/src/client/datascience/jupyter/notebookStarter.ts
@@ -74,7 +74,7 @@ export class NotebookStarter implements Disposable {
 
             // Then use this to launch our notebook process.
             const stopWatch = new StopWatch();
-            const launchResult = await notebookCommand.command!.execObservable(args, { throwOnStdErr: false, encoding: 'utf8', token: cancelToken });
+            const launchResult = await notebookCommand.command!.execObservable(args as string[], { throwOnStdErr: false, encoding: 'utf8', token: cancelToken });
 
             // Watch for premature exits
             if (launchResult.proc) {
diff --git a/src/client/extension.ts b/src/client/extension.ts
index eb27073ed60c..f77fb2b262c7 100644
--- a/src/client/extension.ts
+++ b/src/client/extension.ts
@@ -353,7 +353,7 @@ async function getActivationTelemetryProps(serviceContainer: IServiceContainer):
     const preferredWorkspaceInterpreter = getPreferredWorkspaceInterpreter(mainWorkspaceUri, serviceContainer);
     const usingGlobalInterpreter = isUsingGlobalInterpreterInWorkspace(settings.pythonPath, serviceContainer);
     const usingAutoSelectedWorkspaceInterpreter = preferredWorkspaceInterpreter ? settings.pythonPath === getPreferredWorkspaceInterpreter(mainWorkspaceUri, serviceContainer) : false;
-    const hasPython3 = interpreters
+    const hasPython3 = interpreters!
         .filter(item => item && item.version ? item.version.major === 3 : false)
         .length > 0;
 
diff --git a/src/client/interpreter/locators/services/baseVirtualEnvService.ts b/src/client/interpreter/locators/services/baseVirtualEnvService.ts
index c84f457c28bc..4b46de4a2261 100644
--- a/src/client/interpreter/locators/services/baseVirtualEnvService.ts
+++ b/src/client/interpreter/locators/services/baseVirtualEnvService.ts
@@ -6,7 +6,7 @@ import { Uri } from 'vscode';
 import { traceError } from '../../../common/logger';
 import { IFileSystem, IPlatformService } from '../../../common/platform/types';
 import { IServiceContainer } from '../../../ioc/types';
-import { IInterpreterHelper, IVirtualEnvironmentsSearchPathProvider, PythonInterpreter } from '../../contracts';
+import { IInterpreterHelper, InterpreterType, IVirtualEnvironmentsSearchPathProvider, PythonInterpreter } from '../../contracts';
 import { IVirtualEnvironmentManager } from '../../virtualEnvs/types';
 import { lookForInterpretersInDirectory } from '../helpers';
 import { CacheableLocatorService } from './cacheableLocatorService';
@@ -82,7 +82,7 @@ export class BaseVirtualEnvService extends CacheableLocatorService {
                 return {
                     ...(details as PythonInterpreter),
                     envName: virtualEnvName,
-                    type: type
+                    type: type! as InterpreterType
                 };
             });
     }
diff --git a/src/client/interpreter/locators/services/windowsRegistryService.ts b/src/client/interpreter/locators/services/windowsRegistryService.ts
index 3c87f4856fd7..e99f29a1be66 100644
--- a/src/client/interpreter/locators/services/windowsRegistryService.ts
+++ b/src/client/interpreter/locators/services/windowsRegistryService.ts
@@ -120,7 +120,7 @@ export class WindowsRegistryService extends CacheableLocatorService {
                     this.registry.getValue(tagKey, hive, arch, 'SysVersion'),
                     this.getCompanyDisplayName(companyKey, hive, arch)
                 ]).then(([installedPath, executablePath, version, companyDisplayName]) => {
-                    companyDisplayName = AnacondaCompanyNames.indexOf(companyDisplayName) === -1 ? companyDisplayName : AnacondaCompanyName;
+                    companyDisplayName = AnacondaCompanyNames.indexOf(companyDisplayName!) === -1 ? companyDisplayName : AnacondaCompanyName;
                     // tslint:disable-next-line:prefer-type-cast no-object-literal-type-assertion
                     return { installPath: installedPath, executablePath, version, companyDisplayName } as InterpreterInformation;
                 });