diff --git a/views/home.erb b/views/home.erb
index 6e7cada..61a803f 100644
--- a/views/home.erb
+++ b/views/home.erb
@@ -1,4 +1,11 @@
 <form method="POST" action="/create">
-  <input type="url" name="url" pattern="https?://.+" required placeholder="http://www.example.com/" style="padding: 0.5rem;" />
+  <input type="url"
+    name="url"
+    pattern="https?://.+"
+    required
+    oninvalid="setCustomValidity('Enter a valid URL')"
+    onvalid="setCustomValidity('')"
+    placeholder="http://www.example.com/"
+    style="padding: 0.5rem;" />
   <input type="submit" value="Submit" style="padding: 0.5rem;" />
 </form>