diff --git a/lib/client.py b/lib/client.py
index 018f0fc..0e00cfe 100644
--- a/lib/client.py
+++ b/lib/client.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 import asyncio
 import sys
 import time
+import uuid
 from pathlib import Path
 
 import aiohttp
@@ -54,6 +55,9 @@ class KieClient:
             return 5.0
         return 15.0
 
+    def build_reference_file_name(self, index: int) -> str:
+        return f"reference_{index}_{uuid.uuid4().hex}.png"
+
     async def _request_json(
         self,
         method: str,
@@ -176,7 +180,7 @@ class KieClient:
             image_input.append(
                 await self.upload_reference_image(
                     reference_image_data_uri,
-                    file_name=f"reference_{index}.png",
+                    file_name=self.build_reference_file_name(index),
                 )
             )
 
diff --git a/pyproject.toml b/pyproject.toml
index 9783121..e242ae7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
 name = "wade-kieapi"
 description = "ComfyUI custom node for Kie Nano Banana 2 image generation with optional reference images."
-version = "0.1.3"
+version = "0.1.4"
 license = { file = "LICENSE" }
 requires-python = ">=3.10"
 dynamic = ["dependencies"]
diff --git a/tests/test_client.py b/tests/test_client.py
index 16c7d55..a8f6546 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -228,6 +228,7 @@ def test_generate_images_uploads_all_reference_images_in_order():
     client.create_nano_banana_2_task = fake_create_task
     client.wait_for_task = fake_wait_for_task
     client.download_result_images = fake_download_result_images
+    client.build_reference_file_name = lambda index: f"unique-reference-{index}.png"
 
     raw_images, task_id = asyncio.run(
         client.generate_images(
@@ -248,12 +249,12 @@ def test_generate_images_uploads_all_reference_images_in_order():
     assert task_id == "task_multi_ref"
     assert raw_images == [b"image-bytes"]
     assert uploaded == [
-        ("data:image/png;base64,first", "reference_0.png"),
-        ("data:image/png;base64,second", "reference_1.png"),
-        ("data:image/png;base64,third", "reference_2.png"),
+        ("data:image/png;base64,first", "unique-reference-0.png"),
+        ("data:image/png;base64,second", "unique-reference-1.png"),
+        ("data:image/png;base64,third", "unique-reference-2.png"),
     ]
     assert created_payload["image_input"] == [
-        "https://example.com/reference_0.png",
-        "https://example.com/reference_1.png",
-        "https://example.com/reference_2.png",
+        "https://example.com/unique-reference-0.png",
+        "https://example.com/unique-reference-1.png",
+        "https://example.com/unique-reference-2.png",
     ]
diff --git a/tests/test_registry.py b/tests/test_registry.py
index e5e6ff9..1f7b3d0 100644
--- a/tests/test_registry.py
+++ b/tests/test_registry.py
@@ -22,7 +22,7 @@ def test_registry_metadata_and_workflow_files_exist():
     assert "[project]" in pyproject_text
     assert '[tool.comfy]' in pyproject_text
     assert 'name = "wade-kieapi"' in pyproject_text
-    assert 'version = "0.1.3"' in pyproject_text
+    assert 'version = "0.1.4"' in pyproject_text
     assert 'license = { file = "LICENSE" }' in pyproject_text
     assert 'dynamic = ["dependencies"]' in pyproject_text
     assert 'PublisherId = "wadesong"' in pyproject_text