diff --git a/Makefile b/Makefile
index 0f6986e..dfea02b 100644
--- a/Makefile
+++ b/Makefile
@@ -15,3 +15,6 @@ qr-creator:
 	curl -Lsf https://cdn.jsdelivr.net/npm/qr-creator/dist/qr-creator.min.js -o js/qr-creator.min.js
 	curl -Lsf https://raw.githubusercontent.com/nimiq/qr-creator/refs/heads/master/src/qr-creator.js -o js/qr-creator.js
 
+.PHONY: install
+install:
+	rsync -var --progress ./css ./js ./index.html ./site.webmanifest mariko:/srv/www/bezahlbrudi.jetzt/
diff --git a/index.html b/index.html
index 043805c..4ec3f39 100644
--- a/index.html
+++ b/index.html
@@ -12,18 +12,18 @@
     <meta name="application-name" content="BezahlBrudi">
 
     <!-- seo data -->
-    <meta name="description" lang="en" content="Webapp that generates GiroCodes so that you can easily exchange money with friends and family without involving third party financial services">
+    <meta name="description" lang="en" content="Webapp that generates GiroCodes (EPC QR-Code) so that you can easily exchange money with friends and family without involving third party financial services">
     <meta name="keywords" lang="en" content="giro, sepa, money, finance">
     <meta name="author" content="XenGi">
     <link rel="canonical" href="https://bezahlbrudi.jetzt">
 
     <!-- social media -->
     <meta property="og:title" content="BezahlBrudi">
-    <meta property="og:description" content="Webapp that generates GiroCodes so that you can easily exchange money with friends and family without involving third party financial services">
+    <meta property="og:description" content="Webapp that generates GiroCodes (EPC QR-Code) so that you can easily exchange money with friends and family without involving third party financial services">
     <meta property="og:image" content="https://bezahlbrudi.jetzt/img/sticker.png">
     <meta property="og:image:alt" content="Guy in a blue suit and cape presenting a smartphone showing a QR code pointing to the BezahlBrudi webapp">
     <meta name="twitter:title" content="BezahlBrudi">
-    <meta name="twitter:description" content="Webapp that generates GiroCodes so that you can easily exchange money with friends and family without involving third party financial services">
+    <meta name="twitter:description" content="Webapp that generates GiroCodes (EPC QR-Code) so that you can easily exchange money with friends and family without involving third party financial services">
     <meta name="twitter:url" content="https://bezahlbrudi.jetzt/?src=twitter" />
     <meta name="twitter:image:src" content="https://bezahlbrudi.jetzt/img/sticker.png" />
     <meta name="twitter:image:alt" content="Guy in a blue suit and cape presenting a smartphone showing a QR code pointing to the BezahlBrudi webapp" />
@@ -87,9 +87,10 @@
                 <div id="bic" class="field">
                     <label for="input-bic" class="label">Receiver BIC</label>
                     <div class="control has-icons-right">
-                        <input id="input-bic" class="input" type="text" value="" required>
+                        <input id="input-bic" class="input" type="text" value="">
                         <span class="icon is-small is-right"></span>
                     </div>
+                    <p class="help">Only needed if the Sender and/or Receiver IBAN is outside the EU</p>
                 </div>
 
                 <div id="amount" class="field">
@@ -129,7 +130,7 @@
 <footer class="footer">
     <div class="content has-text-centered">
         <p>
-            <strong>BezahlBrudi v1.0.5</strong> by <a href="https://xengi.de">XenGi</a>.
+            <strong>BezahlBrudi v1.0.6</strong> by <a href="https://xengi.de">XenGi</a>.
             The source code is licensed <a href="https://opensource.org/license/mit">MIT</a>. Find the source code on <a href="https://gitlab.com/xengi/bezahlbrudi/">GitLab</a>.
             <br/>
             This site doesn't store any data outside your browser. This site doesn't provide any financial services. It is a simple QR code generator.
diff --git a/js/index.js b/js/index.js
index 765aac5..49410bd 100644
--- a/js/index.js
+++ b/js/index.js
@@ -76,7 +76,9 @@ validateBic = (target) => {
 validateIban = (target) => {
   if (target.value.length == 0) return
   // IBANs are fucking complicated. this is a hugely simplified check
-  const re = /^[a-z]{2}[0-9]{20}$/i;
+  // If you want to know more look here:
+  // https://www.swift.com/standards/data-standards/iban-international-bank-account-number
+  const re = /^[a-z]{2}[0-9a-z]+$/i;
 
   if (re.test(target.value)) {
     target.classList.remove("is-danger")