diff --git a/paper-card.html b/paper-card.html
index 739dbf9..2502031 100644
--- a/paper-card.html
+++ b/paper-card.html
@@ -168,8 +168,7 @@
          * The text alternative of the card's title image.
          */
         alt: {
-          type: String,
-          value: null
+          type: String
         },
 
         /**