diff --git a/data_gateway_sessions/main.py b/data_gateway_sessions/main.py
index 2292d4e..dcff2bb 100644
--- a/data_gateway_sessions/main.py
+++ b/data_gateway_sessions/main.py
@@ -16,4 +16,4 @@ def extract_and_add_new_measurement_sessions(request):
     :return None:
     """
     BigQuery().extract_and_add_new_measurement_sessions()
-    return 200
+    return "ok"