diff --git a/packages/uipath-llamaindex/pyproject.toml b/packages/uipath-llamaindex/pyproject.toml
index a8a62294..1c6718f5 100644
--- a/packages/uipath-llamaindex/pyproject.toml
+++ b/packages/uipath-llamaindex/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "uipath-llamaindex"
-version = "0.5.12"
+version = "0.5.13"
 description = "Python SDK that enables developers to build and deploy LlamaIndex agents to the UiPath Cloud Platform"
 readme = { file = "README.md", content-type = "text/markdown" }
 requires-python = ">=3.11"
diff --git a/packages/uipath-llamaindex/src/uipath_llamaindex/llms/_openai.py b/packages/uipath-llamaindex/src/uipath_llamaindex/llms/_openai.py
index c8b62adf..71e841e6 100644
--- a/packages/uipath-llamaindex/src/uipath_llamaindex/llms/_openai.py
+++ b/packages/uipath-llamaindex/src/uipath_llamaindex/llms/_openai.py
@@ -50,7 +50,9 @@ def __init__(
         api_version: str = "2024-10-21",
         **kwargs: Any,
     ):
+        token = os.environ.get("UIPATH_ACCESS_TOKEN")
         default_headers_dict = {
+            "Authorization": f"Bearer {token}",
             "X-UiPath-LlmGateway-ApiFlavor": "auto",
             "X-UiPath-LlmGateway-RequestingProduct": "uipath-python-sdk",
             "X-UiPath-LlmGateway-RequestingFeature": "llama-index-agent",
@@ -74,7 +76,7 @@ def __init__(
             "model": model_value,
             "deployment_name": model_value,
             "azure_endpoint": f"{base_url}/{vendor_endpoint}",
-            "api_key": os.environ.get("UIPATH_ACCESS_TOKEN"),
+            "api_key": "uipath-gateway",
             "api_version": api_version,
             "is_chat_model": True,
             "default_headers": default_headers_dict,
diff --git a/packages/uipath-llamaindex/uv.lock b/packages/uipath-llamaindex/uv.lock
index 11236140..9c79c6b7 100644
--- a/packages/uipath-llamaindex/uv.lock
+++ b/packages/uipath-llamaindex/uv.lock
@@ -3496,7 +3496,7 @@ wheels = [
 
 [[package]]
 name = "uipath-llamaindex"
-version = "0.5.12"
+version = "0.5.13"
 source = { editable = "." }
 dependencies = [
     { name = "aiosqlite" },