diff --git a/packages/workflow/src/utils.ts b/packages/workflow/src/utils.ts
index b1ada63be1f68..71d4a50028a35 100644
--- a/packages/workflow/src/utils.ts
+++ b/packages/workflow/src/utils.ts
@@ -67,17 +67,16 @@ type JSONStringifyOptions = {
 };
 
 const replaceCircularReferences = <T>(value: T, knownObjects = new WeakSet()): T => {
-	if (value && typeof value === 'object') {
-		if (knownObjects.has(value)) return '[Circular Reference]' as T;
-		knownObjects.add(value);
-		const copy = (Array.isArray(value) ? [] : {}) as T;
-		for (const key in value) {
-			copy[key] = replaceCircularReferences(value[key], knownObjects);
-		}
-		knownObjects.delete(value);
-		return copy;
+	if (typeof value !== 'object' || value === null || value instanceof RegExp) return value;
+	if ('toJSON' in value && typeof value.toJSON === 'function') return value.toJSON() as T;
+	if (knownObjects.has(value)) return '[Circular Reference]' as T;
+	knownObjects.add(value);
+	const copy = (Array.isArray(value) ? [] : {}) as T;
+	for (const key in value) {
+		copy[key] = replaceCircularReferences(value[key], knownObjects);
 	}
-	return value;
+	knownObjects.delete(value);
+	return copy;
 };
 
 export const jsonStringify = (obj: unknown, options: JSONStringifyOptions = {}): string => {
diff --git a/packages/workflow/test/utils.test.ts b/packages/workflow/test/utils.test.ts
index fb944ec62ab61..268f270e02624 100644
--- a/packages/workflow/test/utils.test.ts
+++ b/packages/workflow/test/utils.test.ts
@@ -18,7 +18,7 @@ describe('jsonParse', () => {
 });
 
 describe('jsonStringify', () => {
-	const source: any = { a: 1, b: 2 };
+	const source: any = { a: 1, b: 2, d: new Date(1680089084200), r: new RegExp('^test$', 'ig') };
 	source.c = source;
 
 	it('should throw errors on circular references by default', () => {
@@ -27,7 +27,7 @@ describe('jsonStringify', () => {
 
 	it('should break circular references when requested', () => {
 		expect(jsonStringify(source, { replaceCircularRefs: true })).toEqual(
-			'{"a":1,"b":2,"c":"[Circular Reference]"}',
+			'{"a":1,"b":2,"d":"2023-03-29T11:24:44.200Z","r":{},"c":"[Circular Reference]"}',
 		);
 	});