diff --git a/.changeset/fix-query-serialization.md b/.changeset/fix-query-serialization.md
new file mode 100644
index 0000000..ecf15bd
--- /dev/null
+++ b/.changeset/fix-query-serialization.md
@@ -0,0 +1,5 @@
+---
+"@labdigital/graphql-fetcher": patch
+---
+
+Fix query serialization producing `[object Object]` instead of the actual query string
diff --git a/src/client.ts b/src/client.ts
index e4421c4..7f8357e 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -1,6 +1,5 @@
 import type { DocumentTypeDecoration } from "@graphql-typed-document-node/core";
 import { type GraphQLError, print } from "graphql";
-import { isNode } from "graphql/language/ast.js";
 import {
 	createRequest,
 	createRequestBody,
@@ -130,9 +129,9 @@ export const initClientFetcher =
 		}
 
 		const query =
-			isNode(astNode) && astNode.kind === "Document"
-				? print(astNode)
-				: astNode.toString();
+			typeof astNode === "string" || astNode instanceof String
+				? astNode.toString()
+				: print(astNode as Parameters<typeof print>[0]);
 		const documentId = createDocumentId(astNode);
 		const request = await createRequest(
 			query,
diff --git a/src/server.ts b/src/server.ts
index 16ac03d..72eb43c 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -11,7 +11,6 @@ import {
 	hasPersistedQueryError,
 } from "./helpers";
 import { print, type GraphQLError } from "graphql";
-import { isNode } from "graphql/language/ast.js";
 import {
 	createRequest,
 	createRequestBody,
@@ -118,9 +117,9 @@ export const initServerFetcher =
 		options: RequestOptions = {},
 	): Promise<GqlResponse<TResponse>> => {
 		const query =
-			isNode(astNode) && astNode.kind === "Document"
-				? print(astNode)
-				: astNode.toString();
+			typeof astNode === "string" || astNode instanceof String
+				? astNode.toString()
+				: print(astNode as Parameters<typeof print>[0]);
 
 		const documentId = createDocumentId(astNode);
 		const request = await createRequest(