diff --git a/stream.py b/stream.py
index d81822c..3c203da 100755
--- a/stream.py
+++ b/stream.py
@@ -206,7 +206,7 @@ class UpstreamHandler():
                 data_new["og:video:width"] = data_raw.get("width")
                 data_new["og:image:height"] = data_raw.get("thumbnail_height")
                 data_new["og:image:width"] = data_raw.get("thumbnail_width")
-                for elem in data_new:
+                for elem in data_new.values():
                     if not isinstance(elem, str):
                         data_valid = False
                         break