diff --git a/keepassxc-browser/options/options.js b/keepassxc-browser/options/options.js
index 3009696..315be8d 100644
--- a/keepassxc-browser/options/options.js
+++ b/keepassxc-browser/options/options.js
@@ -613,7 +613,7 @@ options.initSitePreferences = function() {
             return;
         }
 
-        let value = manualUrl.value.toLowerCase();
+        let value = manualUrl.value;
 
         // Fills the last / char if needed. This ensures the compatibility with Match Patterns
         if (slashNeededForUrl(value)) {