diff --git a/.changeset/fifty-months-mix.md b/.changeset/fifty-months-mix.md
new file mode 100644
index 000000000000..78a009950d7b
--- /dev/null
+++ b/.changeset/fifty-months-mix.md
@@ -0,0 +1,5 @@
+---
+'@astrojs/webapi': minor
+---
+
+Add polyfill for `crypto`
diff --git a/packages/telemetry/package.json b/packages/telemetry/package.json
index 63c20cba33cb..c50c89ba354a 100644
--- a/packages/telemetry/package.json
+++ b/packages/telemetry/package.json
@@ -38,7 +38,7 @@
   "devDependencies": {
     "@types/debug": "^4.1.7",
     "@types/dlv": "^1.1.2",
-    "@types/node": "^14.18.21",
+    "@types/node": "^18.7.21",
     "@types/which-pm-runs": "^1.0.0",
     "astro-scripts": "workspace:*",
     "chai": "^4.3.6",
diff --git a/packages/webapi/mod.d.ts b/packages/webapi/mod.d.ts
index ecc90236488d..60bdbab37796 100644
--- a/packages/webapi/mod.d.ts
+++ b/packages/webapi/mod.d.ts
@@ -1,6 +1,6 @@
 // organize-imports-ignore
 export { pathToPosix } from './lib/utils';
-export { alert, ByteLengthQueuingStrategy, cancelAnimationFrame, cancelIdleCallback, CanvasRenderingContext2D, CharacterData, clearTimeout, Comment, CountQueuingStrategy, CSSStyleSheet, CustomElementRegistry, CustomEvent, Document, DocumentFragment, DOMException, Element, Event, EventTarget, fetch, File, FormData, Headers, HTMLBodyElement, HTMLCanvasElement, HTMLDivElement, HTMLDocument, HTMLElement, HTMLHeadElement, HTMLHtmlElement, HTMLImageElement, HTMLSpanElement, HTMLStyleElement, HTMLTemplateElement, HTMLUnknownElement, Image, ImageData, IntersectionObserver, MediaQueryList, MutationObserver, Node, NodeFilter, NodeIterator, OffscreenCanvas, ReadableByteStreamController, ReadableStream, ReadableStreamBYOBReader, ReadableStreamBYOBRequest, ReadableStreamDefaultController, ReadableStreamDefaultReader, Request, requestAnimationFrame, requestIdleCallback, ResizeObserver, Response, setTimeout, ShadowRoot, structuredClone, StyleSheet, Text, TransformStream, TreeWalker, URLPattern, Window, WritableStream, WritableStreamDefaultController, WritableStreamDefaultWriter, } from './mod.js';
+export { alert, ByteLengthQueuingStrategy, cancelAnimationFrame, cancelIdleCallback, CanvasRenderingContext2D, CharacterData, clearTimeout, Comment, CountQueuingStrategy, crypto, CSSStyleSheet, CustomElementRegistry, CustomEvent, Document, DocumentFragment, DOMException, Element, Event, EventTarget, fetch, File, FormData, Headers, HTMLBodyElement, HTMLCanvasElement, HTMLDivElement, HTMLDocument, HTMLElement, HTMLHeadElement, HTMLHtmlElement, HTMLImageElement, HTMLSpanElement, HTMLStyleElement, HTMLTemplateElement, HTMLUnknownElement, Image, ImageData, IntersectionObserver, MediaQueryList, MutationObserver, Node, NodeFilter, NodeIterator, OffscreenCanvas, ReadableByteStreamController, ReadableStream, ReadableStreamBYOBReader, ReadableStreamBYOBRequest, ReadableStreamDefaultController, ReadableStreamDefaultReader, Request, requestAnimationFrame, requestIdleCallback, ResizeObserver, Response, setTimeout, ShadowRoot, structuredClone, StyleSheet, Text, TransformStream, TreeWalker, URLPattern, Window, WritableStream, WritableStreamDefaultController, WritableStreamDefaultWriter, } from './mod.js';
 export declare const polyfill: {
     (target: any, options?: PolyfillOptions): any;
     internals(target: any, name: string): any;
diff --git a/packages/webapi/package.json b/packages/webapi/package.json
index 2e35c43c7768..61f359a33fda 100644
--- a/packages/webapi/package.json
+++ b/packages/webapi/package.json
@@ -59,7 +59,7 @@
     "@rollup/plugin-typescript": "^8.3.2",
     "@types/chai": "^4.3.1",
     "@types/mocha": "^9.1.1",
-    "@types/node": "^14.18.21",
+    "@types/node": "^18.7.21",
     "@ungap/structured-clone": "^0.3.4",
     "chai": "^4.3.6",
     "event-target-shim": "^6.0.2",
diff --git a/packages/webapi/src/polyfill.ts b/packages/webapi/src/polyfill.ts
index 4d1531a3fede..5fadd5a686e7 100644
--- a/packages/webapi/src/polyfill.ts
+++ b/packages/webapi/src/polyfill.ts
@@ -8,6 +8,7 @@ import {
 	clearTimeout,
 	Comment,
 	CountQueuingStrategy,
+	crypto,
 	CSSStyleSheet,
 	CustomElementRegistry,
 	CustomEvent,
@@ -87,6 +88,7 @@ export {
 	clearTimeout,
 	Comment,
 	CountQueuingStrategy,
+	crypto,
 	CSSStyleSheet,
 	CustomElementRegistry,
 	CustomEvent,
@@ -211,6 +213,7 @@ export const polyfill = (target: any, options?: PolyfillOptions) => {
 		cancelAnimationFrame,
 		cancelIdleCallback,
 		clearTimeout,
+		crypto,
 		fetch,
 		requestAnimationFrame,
 		requestIdleCallback,
diff --git a/packages/webapi/src/ponyfill.ts b/packages/webapi/src/ponyfill.ts
index 368f7ee5b8e2..9be4377c56cb 100644
--- a/packages/webapi/src/ponyfill.ts
+++ b/packages/webapi/src/ponyfill.ts
@@ -14,6 +14,7 @@ import {
 	WritableStreamDefaultController,
 	WritableStreamDefaultWriter,
 } from 'node:stream/web' // Remove when Node 16 is dropped for Node 18.
+import { webcrypto as crypto } from 'node:crypto' // Remove when Node 18 is dropped for Node 20
 import { fetch, File, FormData, Headers, Request, Response } from 'undici' // Remove when Node 16 is dropped for Node 18.
 import { URLPattern } from 'urlpattern-polyfill'
 import {
@@ -133,6 +134,7 @@ export {
 	cancelAnimationFrame,
 	cancelIdleCallback,
 	clearTimeout,
+	crypto,
 	fetch,
 	requestAnimationFrame,
 	requestIdleCallback,
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 82cad787ab3f..635c51a2f190 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -5201,8 +5201,8 @@ importers:
         specifier: ^1.1.2
         version: 1.1.2
       '@types/node':
-        specifier: ^14.18.21
-        version: 14.18.21
+        specifier: ^18.7.21
+        version: 18.16.3
       '@types/which-pm-runs':
         specifier: ^1.0.0
         version: 1.0.0
@@ -5241,8 +5241,8 @@ importers:
         specifier: ^9.1.1
         version: 9.1.1
       '@types/node':
-        specifier: ^14.18.21
-        version: 14.18.21
+        specifier: ^18.7.21
+        version: 18.16.3
       '@ungap/structured-clone':
         specifier: ^0.3.4
         version: 0.3.4