diff --git a/.changeset/few-beds-dance.md b/.changeset/few-beds-dance.md
new file mode 100644
index 00000000..927efa76
--- /dev/null
+++ b/.changeset/few-beds-dance.md
@@ -0,0 +1,5 @@
+---
+'@astrojs/cloudflare': patch
+---
+
+Fixes chunk issues when bundling node_modules dependencies
diff --git a/packages/cloudflare/src/index.ts b/packages/cloudflare/src/index.ts
index 1675dfc1..3f55f693 100644
--- a/packages/cloudflare/src/index.ts
+++ b/packages/cloudflare/src/index.ts
@@ -259,6 +259,21 @@ export default function createIntegration(args?: Options): AstroIntegration {
 					vite.build.rollupOptions.output.banner ||=
 						'globalThis.process ??= {}; globalThis.process.env ??= {};';
 
+					// @ts-expect-error
+					vite.build.rollupOptions.output.manualChunks = (id: string) => {
+						if (id.includes('node_modules')) {
+							if (id.indexOf('node_modules') !== -1) {
+								const basic = id.toString().split('node_modules/')[1];
+								const sub1 = basic.split('/')[0];
+								if (sub1 !== '.pnpm') {
+									return sub1.toString();
+								}
+								const name2 = basic.split('/')[1];
+								return name2.split('@')[name2[0] === '@' ? 1 : 0].toString();
+							}
+						}
+					};
+
 					vite.build.rollupOptions.external = _config.vite.build?.rollupOptions?.external ?? [];
 
 					// Cloudflare env is only available per request. This isn't feasible for code that access env vars
@@ -278,6 +293,12 @@ export default function createIntegration(args?: Options): AstroIntegration {
 					vite.resolve.conditions = vite.resolve.conditions.filter(
 						(c) => c !== 'workerd' && c !== 'worker'
 					);
+
+					vite.build ||= {};
+					vite.build.rollupOptions ||= {};
+					vite.build.rollupOptions.output ||= {};
+					// @ts-expect-error
+					vite.build.rollupOptions.output.manualChunks = undefined;
 				}
 			},
 			'astro:build:done': async ({ pages, routes, dir, logger }) => {