diff --git a/install.xml b/install.xml
new file mode 100644
index 0000000..5d71920
--- /dev/null
+++ b/install.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<modification>
+	<name>CoinGate</name>
+	<code>coningate</code>
+	<version>3.1.3</version>
+	<author>Ivan</author>
+	<!-- Allow 4 characters in form validation -->
+	<file path="admin/controller/localisation/currency.php">
+		<operation>
+			<search><![CDATA[if (utf8_strlen($this->request->post['code']) != 3)]]></search>
+			<add position="replace"><![CDATA[if (!in_array(utf8_strlen($this->request->post['code']), array(3, 4)))]]></add>
+		</operation>
+	</file>
+</modification>
diff --git a/upload/admin/model/extension/payment/coingate.php b/upload/admin/model/extension/payment/coingate.php
index fdd5bdb..2f0c6e8 100644
--- a/upload/admin/model/extension/payment/coingate.php
+++ b/upload/admin/model/extension/payment/coingate.php
@@ -15,7 +15,7 @@ public function install() {
     // Modify the currency table to allow 4-character currency code
     $this->db->query("
       ALTER TABLE `" . DB_PREFIX . "currency`
-      MODIFY `code` VARCHAR(3) NOT NULL;
+      MODIFY `code` VARCHAR(4) COLLATE utf8_general_ci NOT NULL;
     ");
 
     $this->load->model('setting/setting');