diff --git a/package.json b/package.json
index aa3f88f2b5..d19d36bc0c 100644
--- a/package.json
+++ b/package.json
@@ -185,7 +185,7 @@
     "stylelint": "^13.9.0",
     "stylelint-config-standard": "^20.0.0",
     "stylelint-scss": "^3.18.0",
-    "typescript": "4.3.5",
+    "typescript": "4.5.3",
     "walk": "^2.3.14"
   },
   "resolutions": {
diff --git a/src/@types/global.d.ts b/src/@types/global.d.ts
index ed14483fb6..e22dd89d13 100644
--- a/src/@types/global.d.ts
+++ b/src/@types/global.d.ts
@@ -66,6 +66,16 @@ declare global {
         // Needed for Safari, unknown to TypeScript
         webkitAudioContext: typeof AudioContext;
 
+        // https://docs.microsoft.com/en-us/previous-versions/hh772328(v=vs.85)
+        // we only ever check for its existence, so we can ignore its actual type
+        MSStream?: unknown;
+
+        // https://github.com/microsoft/TypeScript-DOM-lib-generator/issues/1029#issuecomment-869224737
+        // https://developer.mozilla.org/en-US/docs/Web/API/OffscreenCanvas
+        OffscreenCanvas?: {
+            new(width: number, height: number): OffscreenCanvas;
+        };
+
         mxContentMessages: ContentMessages;
         mxToastStore: ToastStore;
         mxDeviceListener: DeviceListener;
@@ -123,11 +133,6 @@ declare global {
     }
 
     interface Document {
-        // https://developer.mozilla.org/en-US/docs/Web/API/Document/hasStorageAccess
-        hasStorageAccess?: () => Promise<boolean>;
-        // https://developer.mozilla.org/en-US/docs/Web/API/Document/requestStorageAccess
-        requestStorageAccess?: () => Promise<undefined>;
-
         // Safari & IE11 only have this prefixed: we used prefixed versions
         // previously so let's continue to support them for now
         webkitExitFullscreen(): Promise<void>;
@@ -138,27 +143,26 @@ declare global {
 
     interface Navigator {
         userLanguage?: string;
-        // https://github.com/Microsoft/TypeScript/issues/19473
-        // https://developer.mozilla.org/en-US/docs/Web/API/MediaSession
-        mediaSession: any;
     }
 
     interface StorageEstimate {
         usageDetails?: { [key: string]: number };
     }
 
-    interface HTMLAudioElement {
-        type?: string;
-        // sinkId & setSinkId are experimental and typescript doesn't know about them
-        sinkId: string;
-        setSinkId(outputId: string);
+    // https://developer.mozilla.org/en-US/docs/Web/API/OffscreenCanvas
+    interface OffscreenCanvas {
+        height: number;
+        width: number;
+        getContext: HTMLCanvasElement["getContext"];
+        convertToBlob(opts?: {
+            type?: string;
+            quality?: number;
+        }): Promise<Blob>;
+        transferToImageBitmap(): ImageBitmap;
     }
 
-    interface HTMLVideoElement {
+    interface HTMLAudioElement {
         type?: string;
-        // sinkId & setSinkId are experimental and typescript doesn't know about them
-        sinkId: string;
-        setSinkId(outputId: string);
     }
 
     interface HTMLStyleElement {
@@ -210,6 +214,11 @@ declare global {
         new (options?: AudioWorkletNodeOptions): AudioWorkletProcessor;
     };
 
+    // https://github.com/microsoft/TypeScript-DOM-lib-generator/issues/1029#issuecomment-881509595
+    interface AudioParamDescriptor {
+        readonly port: MessagePort;
+    }
+
     // https://github.com/microsoft/TypeScript/issues/28308#issuecomment-650802278
     function registerProcessor(
         name: string,
diff --git a/src/ContentMessages.tsx b/src/ContentMessages.tsx
index 02cc987735..1405362c83 100644
--- a/src/ContentMessages.tsx
+++ b/src/ContentMessages.tsx
@@ -131,8 +131,8 @@ async function createThumbnail(
         canvas = new window.OffscreenCanvas(targetWidth, targetHeight);
     } else {
         canvas = document.createElement("canvas");
-        canvas.width = targetWidth;
-        canvas.height = targetHeight;
+        (canvas as HTMLCanvasElement).width = targetWidth;
+        (canvas as HTMLCanvasElement).height = targetHeight;
     }
 
     const context = canvas.getContext("2d");
diff --git a/yarn.lock b/yarn.lock
index 959cf70c79..515d0b4e3a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8440,10 +8440,10 @@ typedarray-to-buffer@^3.1.5:
   dependencies:
     is-typedarray "^1.0.0"
 
-typescript@4.3.5:
-  version "4.3.5"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.5.tgz#4d1c37cc16e893973c45a06886b7113234f119f4"
-  integrity sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==
+typescript@4.5.3:
+  version "4.5.3"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.5.3.tgz#afaa858e68c7103317d89eb90c5d8906268d353c"
+  integrity sha512-eVYaEHALSt+s9LbvgEv4Ef+Tdq7hBiIZgii12xXJnukryt3pMgJf6aKhoCZ3FWQsu6sydEnkg11fYXLzhLBjeQ==
 
 ua-parser-js@^0.7.30:
   version "0.7.31"