diff --git a/utils.py b/utils.py
index 89cb246..9d38aa3 100644
--- a/utils.py
+++ b/utils.py
@@ -18,6 +18,9 @@ def compose_config(
     """
 
     if config is not None:
+        DeprecationWarning(
+            "Usage of a full config file will be deprecated. Instead, use the credentials and queries arguments."
+        )
         return json.load(config)
 
     if credentials is None or queries is None: