diff --git a/src/phoenix/session/client.py b/src/phoenix/session/client.py
index 906dbecf41..e3de760e4c 100644
--- a/src/phoenix/session/client.py
+++ b/src/phoenix/session/client.py
@@ -193,6 +193,7 @@ def query_spans(
             raise ValueError(response.content.decode())
         response.raise_for_status()
         source = BytesIO(response.content)
+        print(f"{response.headers=}")
         results = []
         while True:
             try: