diff --git a/package.json b/package.json
index f41993a687..aac1d92518 100644
--- a/package.json
+++ b/package.json
@@ -87,6 +87,7 @@
         "@matrix-org/react-sdk-module-api": "^2.4.0",
         "@matrix-org/spec": "^1.7.0",
         "@sentry/browser": "^8.0.0",
+        "@types/png-chunks-extract": "^1.0.2",
         "@vector-im/compound-design-tokens": "^2.0.1",
         "@vector-im/compound-web": "^7.5.0",
         "@vector-im/matrix-wysiwyg": "2.37.13",
diff --git a/src/@types/png-chunks-extract.d.ts b/src/@types/png-chunks-extract.d.ts
deleted file mode 100644
index c767b40655..0000000000
--- a/src/@types/png-chunks-extract.d.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
-Copyright 2024 New Vector Ltd.
-Copyright 2021 The Matrix.org Foundation C.I.C.
-
-SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
-Please see LICENSE files in the repository root for full details.
-*/
-
-declare module "png-chunks-extract" {
-    interface IChunk {
-        name: string;
-        data: Uint8Array;
-    }
-
-    function extractPngChunks(data: Uint8Array): IChunk[];
-
-    export default extractPngChunks;
-}
diff --git a/src/@types/sanitize-html.d.ts b/src/@types/sanitize-html.d.ts
deleted file mode 100644
index 34474fc655..0000000000
--- a/src/@types/sanitize-html.d.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
-Copyright 2024 New Vector Ltd.
-Copyright 2020 The Matrix.org Foundation C.I.C.
-
-SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
-Please see LICENSE files in the repository root for full details.
-*/
-
-import sanitizeHtml from "sanitize-html";
-
-export interface IExtendedSanitizeOptions extends sanitizeHtml.IOptions {
-    // This option only exists in 2.x RCs so far, so not yet present in the
-    // separate type definition module.
-    nestingLimit?: number;
-}
diff --git a/src/HtmlUtils.tsx b/src/HtmlUtils.tsx
index 3146a9eb07..f5e30734bb 100644
--- a/src/HtmlUtils.tsx
+++ b/src/HtmlUtils.tsx
@@ -10,7 +10,7 @@ Please see LICENSE files in the repository root for full details.
 */
 
 import React, { LegacyRef, ReactNode } from "react";
-import sanitizeHtml from "sanitize-html";
+import sanitizeHtml, { IOptions } from "sanitize-html";
 import classNames from "classnames";
 import katex from "katex";
 import { decode } from "html-entities";
@@ -19,7 +19,6 @@ import { Optional } from "matrix-events-sdk";
 import escapeHtml from "escape-html";
 import { getEmojiFromUnicode } from "@matrix-org/emojibase-bindings";
 
-import { IExtendedSanitizeOptions } from "./@types/sanitize-html";
 import SettingsStore from "./settings/SettingsStore";
 import { stripHTMLReply, stripPlainReply } from "./utils/Reply";
 import { PERMITTED_URL_SCHEMES } from "./utils/UrlUtils";
@@ -126,7 +125,7 @@ export function isUrlPermitted(inputUrl: string): boolean {
 }
 
 // this is the same as the above except with less rewriting
-const composerSanitizeHtmlParams: IExtendedSanitizeOptions = {
+const composerSanitizeHtmlParams: IOptions = {
     ...sanitizeHtmlParams,
     transformTags: {
         "code": transformTags["code"],
@@ -135,7 +134,7 @@ const composerSanitizeHtmlParams: IExtendedSanitizeOptions = {
 };
 
 // reduced set of allowed tags to avoid turning topics into Myspace
-const topicSanitizeHtmlParams: IExtendedSanitizeOptions = {
+const topicSanitizeHtmlParams: IOptions = {
     ...sanitizeHtmlParams,
     allowedTags: [
         "font", // custom to matrix for IRC-style font coloring
diff --git a/src/Linkify.tsx b/src/Linkify.tsx
index d980c496c4..37376cd75a 100644
--- a/src/Linkify.tsx
+++ b/src/Linkify.tsx
@@ -7,7 +7,7 @@ Please see LICENSE files in the repository root for full details.
 */
 
 import React, { ReactElement } from "react";
-import sanitizeHtml from "sanitize-html";
+import sanitizeHtml, { IOptions } from "sanitize-html";
 import { merge } from "lodash";
 import _Linkify from "linkify-react";
 
@@ -17,7 +17,6 @@ import {
     ELEMENT_URL_PATTERN,
     options as linkifyMatrixOptions,
 } from "./linkify-matrix";
-import { IExtendedSanitizeOptions } from "./@types/sanitize-html";
 import SettingsStore from "./settings/SettingsStore";
 import { tryTransformPermalinkToLocalHref } from "./utils/permalinks/Permalinks";
 import { mediaFromMxc } from "./customisations/Media";
@@ -26,7 +25,7 @@ import { PERMITTED_URL_SCHEMES } from "./utils/UrlUtils";
 const COLOR_REGEX = /^#[0-9a-fA-F]{6}$/;
 const MEDIA_API_MXC_REGEX = /\/_matrix\/media\/r0\/(?:download|thumbnail)\/(.+?)\/(.+?)(?:[?/]|$)/;
 
-export const transformTags: NonNullable<IExtendedSanitizeOptions["transformTags"]> = {
+export const transformTags: NonNullable<IOptions["transformTags"]> = {
     // custom to matrix
     // add blank targets to all hyperlinks except vector URLs
     "a": function (tagName: string, attribs: sanitizeHtml.Attributes) {
@@ -137,7 +136,7 @@ export const transformTags: NonNullable<IExtendedSanitizeOptions["transformTags"
     },
 };
 
-export const sanitizeHtmlParams: IExtendedSanitizeOptions = {
+export const sanitizeHtmlParams: IOptions = {
     allowedTags: [
         // These tags are suggested by the spec https://spec.matrix.org/v1.10/client-server-api/#mroommessage-msgtypes
         "font", // custom to matrix for IRC-style font coloring
diff --git a/yarn.lock b/yarn.lock
index 35e7ac04b5..91ddf0626a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3128,6 +3128,11 @@
   resolved "https://registry.yarnpkg.com/@types/pbf/-/pbf-3.0.5.tgz#a9495a58d8c75be4ffe9a0bd749a307715c07404"
   integrity sha512-j3pOPiEcWZ34R6a6mN07mUkM4o4Lwf6hPNt8eilOeZhTFbxFXmKhvXl9Y28jotFPaI1bpPDJsbCprUoNke6OrA==
 
+"@types/png-chunks-extract@^1.0.2":
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/@types/png-chunks-extract/-/png-chunks-extract-1.0.2.tgz#31dd8d74d6ba879ace317c1e042dcdabc6300d6e"
+  integrity sha512-z6djfFIbrrddtunoMJBOPlyZrnmeuG1kkvHUNi2QfpOb+JMMLuLliHHTmMyRi7k7LiTAut0HbdGCF6ibDtQAHQ==
+
 "@types/prop-types@*":
   version "15.7.13"
   resolved "https://registry.yarnpkg.com/@types/prop-types/-/prop-types-15.7.13.tgz#2af91918ee12d9d32914feb13f5326658461b451"