diff --git a/python/mirascope/llm/providers/google/provider.py b/python/mirascope/llm/providers/google/provider.py
index f3137ed5b3..62a464a8d9 100644
--- a/python/mirascope/llm/providers/google/provider.py
+++ b/python/mirascope/llm/providers/google/provider.py
@@ -47,7 +47,10 @@ def __init__(
         """Initialize the Google client."""
         http_options = None
         if base_url:
-            http_options = HttpOptions(base_url=base_url)
+            http_options = HttpOptions(
+                base_url=base_url,
+                headers={"Authorization": f"Bearer {api_key}"},
+            )
 
         self.client = Client(api_key=api_key, http_options=http_options)