diff --git a/index.html b/index.html
index e531c82..cd0d3ed 100644
--- a/index.html
+++ b/index.html
@@ -189,7 +189,7 @@
             </div>
           </div>
         </div>
-        <input id="permalink-input" type="text" />
+        <input id="permalink-input" type="text" readOnly />
         <div id="permalink-btn" class="button permalink">
           <span data-i18n="prices.copy-permalink"></span>
           <svg aria-hidden="true" focusable="false" data-prefix="fas" data-icon="copy" class="svg-inline--fa fa-copy fa-w-14" role="img" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512">