diff --git a/reverse/rootfs/usr/local/bin/startup b/reverse/rootfs/usr/local/bin/startup
index d897b5a..2bdfb2c 100644
--- a/reverse/rootfs/usr/local/bin/startup
+++ b/reverse/rootfs/usr/local/bin/startup
@@ -194,7 +194,15 @@ f_log INF "Start reverse configuration ..."
 
 # Prepare container
 f_log INF "Create user 'reverse'"
-addgroup -g ${GID} reverse && adduser -H -s /bin/sh -D -G reverse -u ${UID} reverse
+if [ "$(grep ${GID} /etc/group)" == "" ]; then
+     addgroup -g ${GID} reverse
+else
+    GROUP_NAME=$(grep ${GID} /etc/group | cut -d: -f1)
+fi
+
+if [ "$(grep ${UID} /etc/passwd)" == "" ]; then
+    adduser -H -s /bin/sh -D -G ${GROUP_NAME} -u ${UID} reverse
+fi
 f_log INF "Create folder"
 mkdir -p /nginx/sites-enabled /nginx /nginx/log /nginx/run /nginx/sites-enabled /nginx/ssl /nginx/ssl/selfsigned/dhparam