diff --git a/custom_components/sonarr_upcoming_media/sensor.py b/custom_components/sonarr_upcoming_media/sensor.py
index 1490d8f..e914b02 100644
--- a/custom_components/sonarr_upcoming_media/sensor.py
+++ b/custom_components/sonarr_upcoming_media/sensor.py
@@ -132,7 +132,7 @@ def device_state_attributes(self):
             except:
                 pass
             card_json.append(card_item)
-        attributes['data'] = json.dumps(card_json)
+        attributes['data'] = card_json
         return attributes
 
     def update(self):