diff --git a/package.json b/package.json
index 66acebbe3e..67964e7bf3 100644
--- a/package.json
+++ b/package.json
@@ -227,7 +227,7 @@
     "terser-webpack-plugin": "^5.1.1",
     "ts-lit-plugin": "^1.2.1",
     "ts-mocha": "^7.0.0",
-    "typescript": "^4.0.3",
+    "typescript": "^4.2.4",
     "vinyl-buffer": "^1.0.1",
     "vinyl-source-stream": "^2.0.0",
     "webpack": "^5.24.1",
diff --git a/src/cast/receiver_messages.ts b/src/cast/receiver_messages.ts
index 460054135d..953d766abd 100644
--- a/src/cast/receiver_messages.ts
+++ b/src/cast/receiver_messages.ts
@@ -62,7 +62,7 @@ export const ensureConnectedCastSession = (cast: CastManager, auth: Auth) => {
     return undefined;
   }
 
-  return new Promise((resolve) => {
+  return new Promise<void>((resolve) => {
     const unsub = cast.addEventListener("connection-changed", () => {
       if (cast.castConnectedToOurHass) {
         unsub();
diff --git a/src/common/util/render-status.ts b/src/common/util/render-status.ts
index b51baffce4..c0319c623c 100644
--- a/src/common/util/render-status.ts
+++ b/src/common/util/render-status.ts
@@ -1,4 +1,4 @@
-export const afterNextRender = (cb: () => void): void => {
+export const afterNextRender = (cb: (value: unknown) => void): void => {
   requestAnimationFrame(() => setTimeout(cb, 0));
 };
 
diff --git a/src/panels/config/cloud/ha-config-cloud.ts b/src/panels/config/cloud/ha-config-cloud.ts
index f3ad9778a6..1bf79fac77 100644
--- a/src/panels/config/cloud/ha-config-cloud.ts
+++ b/src/panels/config/cloud/ha-config-cloud.ts
@@ -73,7 +73,7 @@ class HaConfigCloud extends HassRouterPage {
 
   private _resolveCloudStatusLoaded!: () => void;
 
-  private _cloudStatusLoaded = new Promise((resolve) => {
+  private _cloudStatusLoaded = new Promise<void>((resolve) => {
     this._resolveCloudStatusLoaded = resolve;
   });
 
diff --git a/src/panels/config/devices/ha-config-device-page.ts b/src/panels/config/devices/ha-config-device-page.ts
index 8b04716baf..187a05f875 100644
--- a/src/panels/config/devices/ha-config-device-page.ts
+++ b/src/panels/config/devices/ha-config-device-page.ts
@@ -728,7 +728,7 @@ export class HaConfigDevicePage extends LitElement {
           }
 
           if (!newName && !newEntityId) {
-            return new Promise((resolve) => resolve());
+            return undefined;
           }
 
           return updateEntityRegistryEntry(this.hass!, entity.entity_id, {
diff --git a/src/panels/config/integrations/integration-panels/zha/zha-device-card.ts b/src/panels/config/integrations/integration-panels/zha/zha-device-card.ts
index 0cf283011e..d2c37635ac 100644
--- a/src/panels/config/integrations/integration-panels/zha/zha-device-card.ts
+++ b/src/panels/config/integrations/integration-panels/zha/zha-device-card.ts
@@ -159,7 +159,7 @@ class ZHADeviceCard extends SubscribeMixin(LitElement) {
       }
 
       if (!newName && !newEntityId) {
-        return new Promise((resolve) => resolve());
+        return undefined;
       }
 
       return updateEntityRegistryEntry(this.hass!, entity.entity_id, {
diff --git a/src/state/haptic-mixin.ts b/src/state/haptic-mixin.ts
index 384c31b9a9..6a4483c3bb 100644
--- a/src/state/haptic-mixin.ts
+++ b/src/state/haptic-mixin.ts
@@ -40,6 +40,7 @@ export const hapticMixin = <T extends Constructor<HassBaseEl>>(superClass: T) =>
       super.firstUpdated(changedProps);
       this.addEventListener("hass-vibrate", (ev) => {
         const vibrate = ev.detail.vibrate;
+        // @ts-expect-error not all browsers support vibrate
         if (navigator.vibrate && vibrate) {
           window.addEventListener("haptic", handleHaptic);
         } else {
@@ -52,6 +53,7 @@ export const hapticMixin = <T extends Constructor<HassBaseEl>>(superClass: T) =>
 
     protected hassConnected() {
       super.hassConnected();
+      // @ts-expect-error not all browsers support vibrate
       if (navigator.vibrate && this.hass!.vibrate) {
         window.addEventListener("haptic", handleHaptic);
       }
diff --git a/yarn.lock b/yarn.lock
index 1c1ffef5e4..5abd1ee959 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -13468,10 +13468,10 @@ typescript@^3.8.3:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
   integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==
 
-typescript@^4.0.3:
-  version "4.0.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.3.tgz#153bbd468ef07725c1df9c77e8b453f8d36abba5"
-  integrity sha512-tEu6DGxGgRJPb/mVPIZ48e69xCn2yRmCgYmDugAVwmJ6o+0u1RI18eO7E7WBTLYLaEVVOhwQmcdhQHweux/WPg==
+typescript@^4.2.4:
+  version "4.2.4"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.2.4.tgz#8610b59747de028fda898a8aef0e103f156d0961"
+  integrity sha512-V+evlYHZnQkaz8TRBuxTA92yZBPotr5H+WhQ7bD3hZUndx5tGOa1fuCgeSjxAzM1RiN5IzvadIXTVefuuwZCRg==
 
 typical@^4.0.0:
   version "4.0.0"