diff --git a/build-deb/Makefile b/build-deb/Makefile
index 576a320..0a5614c 100644
--- a/build-deb/Makefile
+++ b/build-deb/Makefile
@@ -8,6 +8,8 @@ deb: man ../requirments.txt ../run.py ../luser ../LICENSE
 	cp -r ../luser/* luser/var/luser/luser/
 	cp ../run.py luser/var/luser/
 	cp ../LICENSE luser/var/luser/
+	chmod -w luser/DEBIAN/*
+	chmod +w luser/DEBIAN/control
 	dpkg-deb --build luser
 clean:
 	rm -f luser.deb
diff --git a/build-deb/luser/DEBIAN/control b/build-deb/luser/DEBIAN/control
index 403e66d..4772ada 100644
--- a/build-deb/luser/DEBIAN/control
+++ b/build-deb/luser/DEBIAN/control
@@ -4,8 +4,8 @@ Priority: optional
 Architecture: all
 Essential: no
 Installed-Size: 2000
-Depends: python3-flask, python3-ldap3, gunicorn
+Depends: python3-flask, python3-ldap3, gunicorn, imagemagick, python3-passlib
 Homepage: https://gitea.dmz.rs/fram3d/luser
 Maintainer: fram3d <fram3d@dmz.rs>
 Description: Web app that allows users to add,remove and change passwords in LDAP system
-Version: 1.0.2
+Version: 1.0.4
diff --git a/build-deb/luser/DEBIAN/postinst b/build-deb/luser/DEBIAN/postinst
index 573bb70..7cfb3f5 100755
--- a/build-deb/luser/DEBIAN/postinst
+++ b/build-deb/luser/DEBIAN/postinst
@@ -1,5 +1,7 @@
-#!/bin/sh
+#!/bin/bash
 /usr/bin/systemctl enable luser.service
 /sbin/service luser start
-cp /tmp/oldluserconfig.ini /var/luser/luser/config.ini
-rm /tmp/oldluserconfig.ini
+if [ -f /tmp/oldluserconfig.ini ] ; then
+	cp /tmp/oldluserconfig.ini /var/luser/luser/config.ini
+	rm /tmp/oldluserconfig.ini
+fi
diff --git a/build-deb/luser/DEBIAN/preinst b/build-deb/luser/DEBIAN/preinst
index 8f060aa..b7976a0 100755
--- a/build-deb/luser/DEBIAN/preinst
+++ b/build-deb/luser/DEBIAN/preinst
@@ -1,2 +1,4 @@
-#!/bin/sh
-cp /var/luser/luser/config.ini /tmp/oldluserconfig.ini
+#!/bin/bash
+if [ -f /var/luser/luser/config.ini ] ; then
+	cp /var/luser/luser/config.ini /tmp/oldluserconfig.ini
+fi
diff --git a/build-deb/luser/DEBIAN/prerm b/build-deb/luser/DEBIAN/prerm
index 1044fe7..ffac95f 100755
--- a/build-deb/luser/DEBIAN/prerm
+++ b/build-deb/luser/DEBIAN/prerm
@@ -1,4 +1,6 @@
-#!/bin/sh
+#!/bin/bash
 /sbin/service luser stop
 /usr/bin/systemdctl disable luser.service
-cp /var/luser/luser/config.ini /tmp/oldluserconfig.ini
+if [ -f /var/luser/luser/config.ini ] ; then
+	cp /var/luser/luser/config.ini /tmp/oldluserconfig.ini
+fi
diff --git a/build-deb/luser/lib/systemd/system/luser.service b/build-deb/luser/lib/systemd/system/luser.service
index 3505f83..561a682 100644
--- a/build-deb/luser/lib/systemd/system/luser.service
+++ b/build-deb/luser/lib/systemd/system/luser.service
@@ -5,7 +5,7 @@ After=network.target nss-lookup.target
 
 [Service]
 WorkingDirectory=/var/luser/
-ExecStart=/usr/bin/gunicorn --workers 3 --bind 127.0.0.1:5000 run:app
+ExecStart=/usr/bin/gunicorn --workers 3 --bind 0.0.0.0:80 run:app
 
 [Install]
 WantedBy=multi-user.target
diff --git a/build-deb/luser/usr/local/bin/captcha.sh b/build-deb/luser/usr/local/bin/captcha.sh
new file mode 100755
index 0000000..9fa4a52
--- /dev/null
+++ b/build-deb/luser/usr/local/bin/captcha.sh
@@ -0,0 +1,100 @@
+#!/bin/sh
+
+# This script is an example captcha script.
+# It takes the text to recognize in the captcha image as a parameter.
+# It return the image binary as a result. ejabberd support PNG, JPEG and GIF.
+
+# The whole idea of the captcha script is to let server admins adapt it to
+# their own needs. The goal is to be able to make the captcha generation as
+# unique as possible, to make the captcha challenge difficult to bypass by
+# a bot.
+# Server admins are thus supposed to write and use their own captcha generators.
+
+# This script relies on ImageMagick.
+# It is NOT compliant with ImageMagick forks like GraphicsMagick.
+
+INPUT=$1
+
+if test -n ${BASH_VERSION:-''} ; then
+    get_random ()
+    {  
+	R=$RANDOM
+    }
+else
+    for n in `od -A n -t u2 -N 48 /dev/urandom`; do RL="$RL$n "; done
+    get_random ()
+    {  
+	R=${RL%% *}
+	RL=${RL#* }
+    }
+fi
+
+get_random
+WAVE1_AMPLITUDE=$((2 + $R % 5))
+get_random
+WAVE1_LENGTH=$((50 + $R % 25))
+get_random
+WAVE2_AMPLITUDE=$((2 + $R % 5))
+get_random
+WAVE2_LENGTH=$((50 + $R % 25))
+get_random
+WAVE3_AMPLITUDE=$((2 + $R % 5))
+get_random
+WAVE3_LENGTH=$((50 + $R % 25))
+get_random
+W1_LINE_START_Y=$((10 + $R % 40))
+get_random
+W1_LINE_STOP_Y=$((10 + $R % 40))
+get_random
+W2_LINE_START_Y=$((10 + $R % 40))
+get_random
+W2_LINE_STOP_Y=$((10 + $R % 40))
+get_random
+W3_LINE_START_Y=$((10 + $R % 40))
+get_random
+W3_LINE_STOP_Y=$((10 + $R % 40))
+
+get_random
+B1_LINE_START_Y=$(($R % 40))
+get_random
+B1_LINE_STOP_Y=$(($R % 40))
+get_random
+B2_LINE_START_Y=$(($R % 40))
+get_random
+B2_LINE_STOP_Y=$(($R % 40))
+#B3_LINE_START_Y=$(($R % 40))
+#B3_LINE_STOP_Y=$(($R % 40))
+
+get_random
+B1_LINE_START_X=$(($R % 20))
+get_random
+B1_LINE_STOP_X=$((100 + $R % 40))
+get_random
+B2_LINE_START_X=$(($R % 20))
+get_random
+B2_LINE_STOP_X=$((100 + $R % 40))
+#B3_LINE_START_X=$(($R % 20))
+#B3_LINE_STOP_X=$((100 + $R % 40))
+
+get_random
+ROLL_X=$(($R % 40))
+
+convert -size 180x60 xc:none -pointsize 40 \
+	\( -clone 0 -fill white \
+	-stroke black -strokewidth 4 -annotate +0+40 "$INPUT" \
+	-stroke white -strokewidth 2 -annotate +0+40 "$INPUT" \
+	-roll +$ROLL_X+0 \
+	-wave "$WAVE1_AMPLITUDE"x"$WAVE1_LENGTH" \
+	-roll -$ROLL_X+0 \) \
+	\( -clone 0 -stroke black \
+	-strokewidth 1 -draw \
+	"line $B1_LINE_START_X,$B1_LINE_START_Y $B1_LINE_STOP_X,$B1_LINE_STOP_Y" \
+	-strokewidth 1 -draw \
+	"line $B2_LINE_START_X,$B2_LINE_START_Y $B2_LINE_STOP_X,$B2_LINE_STOP_Y" \
+	-wave "$WAVE2_AMPLITUDE"x"$WAVE2_LENGTH" \) \
+	\( -clone 0 -stroke white \
+	-strokewidth 2 -draw "line 0,$W1_LINE_START_Y 140,$W1_LINE_STOP_Y" \
+	-strokewidth 2 -draw "line 0,$W2_LINE_START_Y 140,$W2_LINE_STOP_Y" \
+	-strokewidth 2 -draw "line 0,$W3_LINE_START_Y 140,$W3_LINE_STOP_Y" \
+	-wave "$WAVE3_AMPLITUDE"x"$WAVE3_LENGTH" \) \
+	-flatten -crop 140x60 +repage -quality 90 -depth 8 png:-
diff --git a/luser/config.ini b/luser/config.ini
index 1084b0d..0afa144 100644
--- a/luser/config.ini
+++ b/luser/config.ini
@@ -3,6 +3,6 @@ LDAPHOST = ldap.example.org
 LDAPADMINNAME = cn=admin,dc=example,dc=org
 LDAPPASS = verysecr3t
 USERBASE = ou=Users,dc=example,dc=org
-CAPTCHA_PATH = /var/luser/luser/static/account/register/captcha_img/
+CAPTCHA_PATH = /var/luser/luser/static/register/captcha_img/
 ALTUSERBASE = 
 # ALTUSERBASE = ou=UsersAlt,dc=example,dc=org