diff --git a/assets/js/app.js b/assets/js/app.js
index 5f7066f..62f891a 100644
--- a/assets/js/app.js
+++ b/assets/js/app.js
@@ -50,8 +50,8 @@ function validateArchiveUrl(url) {
     try {
         const archiveUrl = new URL(url);
 
-        var urlPattern = new RegExp("(http|https)://archive.org/details/[a-zA-Z0-9_-]*$")
-        if (!urlPattern.test(url) ){
+        var urlPattern = new RegExp("(http|https)://archive.org/details/[a-zA-Z0-9\._-]*$")
+        if (!urlPattern.test(url) ) {
             throw 'Paste and archive.org url';
         }
     } catch (e) {