diff --git a/README.markdown b/README.markdown
index c2bee16..759e65a 100644
--- a/README.markdown
+++ b/README.markdown
@@ -65,7 +65,8 @@ Example:
         "fontname": "Comic Sans MS",
         "fontsize": 30,
         "bgcolor": [20, 120, 20],
-        "textcolor": [180, 20, 180]
+        "textcolor": [180, 20, 180],
+        "cover_url": "https://website.com/image.png"
     }
 }
 ```