diff --git a/.changeset/tame-dots-wash.md b/.changeset/tame-dots-wash.md
new file mode 100644
index 00000000000..53d0c2ed873
--- /dev/null
+++ b/.changeset/tame-dots-wash.md
@@ -0,0 +1,5 @@
+---
+"@remix-run/server-runtime": patch
+---
+
+fix: change `serializeError` to sync function
diff --git a/contributors.yml b/contributors.yml
index fe99dfc30d3..df0864cf060 100644
--- a/contributors.yml
+++ b/contributors.yml
@@ -489,6 +489,7 @@
 - XiNiHa
 - xstevenyung
 - xdivby0
+- xuchaobei
 - yauri-io
 - yesmeck
 - yomeshgupta
diff --git a/packages/remix-server-runtime/errors.ts b/packages/remix-server-runtime/errors.ts
index 85f98407f8c..09549bf2c17 100644
--- a/packages/remix-server-runtime/errors.ts
+++ b/packages/remix-server-runtime/errors.ts
@@ -57,7 +57,7 @@ export type SerializedError = {
   stack?: string;
 };
 
-export async function serializeError(error: Error): Promise<SerializedError> {
+export function serializeError(error: Error): SerializedError {
   return {
     message: error.message,
     stack: error.stack,
diff --git a/packages/remix-server-runtime/server.ts b/packages/remix-server-runtime/server.ts
index 0c6503a3588..d04ea5b6b0e 100644
--- a/packages/remix-server-runtime/server.ts
+++ b/packages/remix-server-runtime/server.ts
@@ -373,8 +373,8 @@ async function handleResourceRequestRR(
   }
 }
 
-async function errorBoundaryError(error: Error, status: number) {
-  return json(await serializeError(error), {
+function errorBoundaryError(error: Error, status: number) {
+  return json(serializeError(error), {
     status,
     headers: {
       "X-Remix-Error": "yes",