diff --git a/appinfo/info.xml b/appinfo/info.xml
index 7bcdfd7..faef768 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -12,7 +12,7 @@
 	<bugs>https://github.com/nextcloud/apps/issues</bugs>
 	<repository type="git">https://github.com/nextcloud/apps.git</repository>
 	<dependencies>
-		<nextcloud min-version="12" max-version="12" />
+		<nextcloud min-version="13" max-version="13" />
 	</dependencies>
 	<version>0.4</version>
 	<shipped>true</shipped>
diff --git a/lib/imap.php b/lib/imap.php
index b7bde1b..27fbd08 100644
--- a/lib/imap.php
+++ b/lib/imap.php
@@ -56,7 +56,13 @@ class OC_User_IMAP extends \OCA\user_external\Base {
 			$users[] = $row['userid'];
 		}
 
-		if(count($users) === 1) {
+		// Replace escaped @ symbol in uid (which is a mail address)
+		// but only if there is no @ symbol and if there is a %40 inside the uid
+		if (!(strpos($uid, '@') !== false) && (strpos($uid, '%40') !== false)) {
+			$uid = str_replace("%40","@",$uid);
+		}
+
+    if(count($users) === 1) {
 			$username = $uid;
 			$uid = $users[0];
  		// Check if we only want logins from ONE domain and strip the domain part from UID