diff --git a/.changeset/modern-buses-think.md b/.changeset/modern-buses-think.md
new file mode 100644
index 000000000..24e50e787
--- /dev/null
+++ b/.changeset/modern-buses-think.md
@@ -0,0 +1,5 @@
+---
+"@opennextjs/cloudflare": patch
+---
+
+fix(patches): Update patchInstrumentation and loadManifest to work with Next 15.4
diff --git a/packages/cloudflare/src/cli/build/patches/plugins/instrumentation.spec.ts b/packages/cloudflare/src/cli/build/patches/plugins/instrumentation.spec.ts
index b71ba339f..b34930b58 100644
--- a/packages/cloudflare/src/cli/build/patches/plugins/instrumentation.spec.ts
+++ b/packages/cloudflare/src/cli/build/patches/plugins/instrumentation.spec.ts
@@ -1,7 +1,7 @@
 import { patchCode } from "@opennextjs/aws/build/patch/astCodePatcher.js";
 import { describe, expect, test } from "vitest";
 
-import { getNext14Rule, getNext15Rule } from "./instrumentation.js";
+import { getNext14Rule, getNext15Rule, getNext154Rule } from "./instrumentation.js";
 
 describe("LoadInstrumentationModule (Next15)", () => {
 	const code = `
@@ -96,3 +96,59 @@ describe("prepareImpl (Next14)", () => {
     `);
 	});
 });
+
+describe("getInstrumenationModule (Next15.4)", () => {
+	const code = `
+    async function getInstrumentationModule(projectDir, distDir) {
+      if (cachedInstrumentationModule) {
+        return cachedInstrumentationModule;
+      }
+      try {
+        cachedInstrumentationModule = (0, _interopdefault.interopDefault)(await require(_nodepath.default.join(projectDir, distDir, "server", \`\${_constants.INSTRUMENTATION_HOOK_FILENAME}.js\`)));
+        return cachedInstrumentationModule;
+      } catch (err) {
+        if ((0, _iserror.default)(err) && err.code !== "ENOENT" && err.code !== "MODULE_NOT_FOUND" && err.code !== "ERR_MODULE_NOT_FOUND") {
+          throw err;
+        }
+      }
+    }
+  `;
+
+	test("patch when an instrumentation file is not present", async () => {
+		expect(patchCode(code, getNext154Rule(null))).toMatchInlineSnapshot(`
+			"async function getInstrumentationModule(projectDir, distDir) {
+			      if (cachedInstrumentationModule) {
+			        return cachedInstrumentationModule;
+			      }
+			      try {
+			        cachedInstrumentationModule = null;
+			        return cachedInstrumentationModule;
+			      } catch (err) {
+			        if ((0, _iserror.default)(err) && err.code !== "ENOENT" && err.code !== "MODULE_NOT_FOUND" && err.code !== "ERR_MODULE_NOT_FOUND") {
+			          throw err;
+			        }
+			      }
+			    }
+			  "
+		`);
+	});
+
+	test("patch when an instrumentation file is present", async () => {
+		expect(patchCode(code, getNext154Rule("/_file_exists_/instrumentation.js"))).toMatchInlineSnapshot(`
+			"async function getInstrumentationModule(projectDir, distDir) {
+			      if (cachedInstrumentationModule) {
+			        return cachedInstrumentationModule;
+			      }
+			      try {
+			        cachedInstrumentationModule = require('/_file_exists_/instrumentation.js');
+			        return cachedInstrumentationModule;
+			      } catch (err) {
+			        if ((0, _iserror.default)(err) && err.code !== "ENOENT" && err.code !== "MODULE_NOT_FOUND" && err.code !== "ERR_MODULE_NOT_FOUND") {
+			          throw err;
+			        }
+			      }
+			    }
+			  "
+		`);
+	});
+});
diff --git a/packages/cloudflare/src/cli/build/patches/plugins/instrumentation.ts b/packages/cloudflare/src/cli/build/patches/plugins/instrumentation.ts
index 74f64754b..812e7aea4 100644
--- a/packages/cloudflare/src/cli/build/patches/plugins/instrumentation.ts
+++ b/packages/cloudflare/src/cli/build/patches/plugins/instrumentation.ts
@@ -4,12 +4,28 @@ import { join } from "node:path";
 import { type BuildOptions, getPackagePath } from "@opennextjs/aws/build/helper.js";
 import { patchCode } from "@opennextjs/aws/build/patch/astCodePatcher.js";
 import type { ContentUpdater, Plugin } from "@opennextjs/aws/plugins/content-updater.js";
+import { getCrossPlatformPathRegex } from "@opennextjs/aws/utils/regex.js";
 
 import { normalizePath } from "../../utils/normalize-path.js";
 
 export function patchInstrumentation(updater: ContentUpdater, buildOpts: BuildOptions): Plugin {
 	const builtInstrumentationPath = getBuiltInstrumentationPath(buildOpts);
 
+	updater.updateContent("patch-instrumentation-next15-4", [
+		{
+			field: {
+				filter: getCrossPlatformPathRegex(
+					String.raw`/server/lib/router-utils/instrumentation-globals.external\.js$`,
+					{
+						escape: false,
+					}
+				),
+				contentFilter: /getInstrumentationModule\(/,
+				callback: ({ contents }) => patchCode(contents, getNext154Rule(builtInstrumentationPath)),
+			},
+		},
+	]);
+
 	updater.updateContent("patch-instrumentation-next15", [
 		{
 			field: {
@@ -36,6 +52,28 @@ export function patchInstrumentation(updater: ContentUpdater, buildOpts: BuildOp
 	};
 }
 
+export function getNext154Rule(builtInstrumentationPath: string | null) {
+	return `
+rule:
+  kind: expression_statement
+  has:
+    kind: assignment_expression
+    all:
+      - has: { pattern: "cachedInstrumentationModule" }
+      - has: { kind: call_expression, regex: "INSTRUMENTATION_HOOK_FILENAME"}
+  inside:
+    kind: try_statement
+    stopBy: end
+    has: { regex: "return cachedInstrumentationModule" }
+    inside:
+      kind: function_declaration
+      stopBy: end
+      has: { field: name, pattern: getInstrumentationModule }
+fix: |-
+      cachedInstrumentationModule = ${builtInstrumentationPath ? `require('${builtInstrumentationPath}')` : "null"};
+`;
+}
+
 export function getNext15Rule(builtInstrumentationPath: string | null) {
 	return `
     rule:
diff --git a/packages/cloudflare/src/cli/build/patches/plugins/load-manifest.ts b/packages/cloudflare/src/cli/build/patches/plugins/load-manifest.ts
index 960cfe9f1..669397ee1 100644
--- a/packages/cloudflare/src/cli/build/patches/plugins/load-manifest.ts
+++ b/packages/cloudflare/src/cli/build/patches/plugins/load-manifest.ts
@@ -39,7 +39,9 @@ async function getLoadManifestRule(buildOpts: BuildOptions) {
 	const baseDir = join(outputDir, "server-functions/default", getPackagePath(buildOpts));
 	const dotNextDir = join(baseDir, ".next");
 
-	const manifests = await glob(join(dotNextDir, "**/*-manifest.json"), { windowsPathsNoEscape: true });
+	const manifests = await glob(join(dotNextDir, "**/{*-manifest,required-server-files}.json"), {
+		windowsPathsNoEscape: true,
+	});
 
 	const returnManifests = (
 		await Promise.all(
@@ -62,6 +64,9 @@ function loadManifest($PATH, $$$ARGS) {
 		fix: `
 function loadManifest($PATH, $$$ARGS) {
   $PATH = $PATH.replaceAll(${JSON.stringify(sep)}, ${JSON.stringify(posix.sep)});
+  if ($PATH === "/.next/BUILD_ID") {
+  return process.env.NEXT_BUILD_ID;
+	}
   ${returnManifests}
   throw new Error(\`Unexpected loadManifest(\${$PATH}) call!\`);
 }`,