diff --git a/flashcards.js b/flashcards.js
index 7c94530..b8d8c2c 100644
--- a/flashcards.js
+++ b/flashcards.js
@@ -272,6 +272,8 @@
   };
 
   FC.importCardSetFromURL = function(ev) {
+    ev.preventDefault();
+
     fetch(FC.$('input[name=importURL]').value)
     .then(resp => resp.json())
     .then(set => {