diff --git a/conf/ldap_plugin.src b/conf/ldap_plugin.src
index 6802bd1..bf7697f 100644
--- a/conf/ldap_plugin.src
+++ b/conf/ldap_plugin.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://gitlab.lindenaar.net/piwigo/Ldap_Login/repository/archive.zip?ref=master
-SOURCE_SUM=e33b35deb7fc2f23a185fc278c7f2208dedde2153d23f710579c4bdd23ef1b36
+SOURCE_URL=http://piwigo.org/ext/download.php?rid=4849
+SOURCE_SUM=523c532b9fec1328510bdb12f6ffd2af4f134a33b86b22cf6fc4c7eaebb6e954
 SOURCE_FORMAT=zip
 SOURCE_IN_SUBDIR=true
 
diff --git a/conf/nginx.conf b/conf/nginx.conf
index f997658..eef6ba5 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -1,6 +1,6 @@
 location __PATH__ {
        alias __FINALPATH__/;
-       client_max_body_size 1G;
+       client_max_body_size 100M;
        index index.php;
        default_type text/html;
        location ~ [^/]\.php(/|$) {
diff --git a/conf/php-fpm.ini b/conf/php-fpm.ini
index c3d888a..3fbeb35 100644
--- a/conf/php-fpm.ini
+++ b/conf/php-fpm.ini
@@ -1,7 +1,7 @@
 ; Common values to change to increase file upload limit
-upload_max_filesize = 1G
-post_max_size = 1G
+upload_max_filesize = 100M
+post_max_size = 100M
 
 ; Other common parameters
-max_execution_time = 600
-max_input_time = 300
+max_execution_time = 3600
+max_input_time = 3600
diff --git a/scripts/_common.sh b/scripts/_common.sh
index beef539..2a3b1f5 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -3,6 +3,8 @@
 # Common variables
 #
 
+pkg_dependencies="php5-gd"
+
 # ============= FUTURE YUNOHOST HELPERS =============
 
 # Create a dedicated fail2ban config (jail and filter conf files)
diff --git a/scripts/backup b/scripts/backup
index b675bb8..f5b753c 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -22,7 +22,7 @@ source /usr/share/yunohost/helpers
 app=$YNH_APP_INSTANCE_NAME
 
 domain=$(ynh_app_setting_get $app domain)
-final_path="/var/www/${app}"
+final_path=$(ynh_app_setting_get "$app" final_path)
 db_name=$(ynh_app_setting_get $app db_name)
 
 #=================================================
diff --git a/scripts/install b/scripts/install
index 5f37f17..a84bb03 100644
--- a/scripts/install
+++ b/scripts/install
@@ -63,6 +63,10 @@ ynh_app_setting_set $app language "$language"
 #=================================================
 # STANDARD MODIFICATIONS
 #=================================================
+# INSTALL DEPENDENCIES
+#=================================================
+
+ynh_install_app_dependencies "$pkg_dependencies"
 
 #=================================================
 # CREATE A MYSQL DB
@@ -100,23 +104,21 @@ ynh_system_user_create $app	# Create a dedicated system user
 
 # Install files and set permissions
 mkdir $final_path
-cp -a $TMPDIR/!(upload|galleries) $final_path
+cp -a $TMPDIR/!(upload|_data) $final_path
 
 datapath=/home/yunohost.app/$app
-mkdir -p $datapath
-mkdir -p $datapath/galleries
+mkdir -p $datapath/_data
 mkdir -p $datapath/upload
 
-ln -sd $datapath/galleries $final_path/galleries
-cp -a $TMPDIR/galleries/* $final_path/galleries/
+ln -sd $datapath/_data $final_path/_data
 ln -sd $datapath/upload $final_path/upload
 
 chown -R $app: $final_path
 chown -R $app: $datapath
-chmod 755 -R $final_path/galleries
+chmod 755 -R $final_path/_data
 
 #=================================================
-# NGINX CONFIGURATION
+# NGINX AND PHP-FPM CONFIGURATION
 #=================================================
 
 ynh_add_nginx_config
@@ -125,10 +127,10 @@ ynh_store_file_checksum "/etc/nginx/conf.d/$domain.d/$app.conf"
 # Copy and set php-fpm configuration
 ynh_add_fpm_config
 
-# Set permissions and reload nginx (needed at this stage for the PHP piwigo installation process)
-systemctl reload nginx
-sleep 5s
-systemctl reload php5-fpm
+#=================================================
+# CONFIGURE PIWIGO
+#=================================================
+
 ynh_app_setting_set "$app" unprotected_uris "/"
 yunohost app ssowatconf
 
@@ -138,7 +140,6 @@ adm_pwd=$(ynh_string_random 24)
 ynh_app_setting_set $app admin_pwd "$adm_pwd"
 
 # Configure piwigo via curl
-sleep 5s
 mail="$(ynh_user_get_info $admin mail)"
 ynh_local_curl "/install.php?language=$applanguage" "install=true" "dbuser=$db_user" "dbpasswd=$db_pwd" "dbname=$db_name" "admin_name=$admin" "admin_pass1=$adm_pwd" "admin_pass2=$adm_pwd" "admin_mail=$mail"
 
@@ -155,6 +156,10 @@ cp ../conf/database.inc.php $final_path/local/config/database.inc.php
 # Calculate and store the database config file checksum
 ynh_store_file_checksum "$final_path/local/config/database.inc.php"
 
+#=================================================
+# ADD LDAP & FAIL2BAN PLUGINS
+#=================================================
+
 # Activate LDAP plugin
 ynh_mysql_connect_as $db_name $db_pwd $db_user <<< "INSERT INTO plugins (id,state,version) VALUES ('Ldap_Login','active','1.1');"
 
diff --git a/scripts/remove b/scripts/remove
index c9d0b71..b9cb134 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -1,7 +1,5 @@
 #!/bin/bash
 
-# Treat unset variables as an error
-set -u
 #=================================================
 # GENERIC STARTING
 #=================================================
@@ -24,6 +22,11 @@ domain=$(ynh_app_setting_get "$app" domain)
 #=================================================
 # STANDARD REMOVE
 #=================================================
+# REMOVE DEPENDENCIES
+#=================================================
+
+# Remove metapackage and its dependencies
+ynh_remove_app_dependencies
 
 #=================================================
 # REMOVE THE MYSQL DB
@@ -36,7 +39,6 @@ ynh_mysql_remove_db "$app" "$db_name"
 #=================================================
 
 ynh_secure_remove "/var/www/$app"
-ynh_secure_remove "/home/yunohost.app/$app"
 
 #=================================================
 # REMOVE FAIL2BAN CONFIGURATION
@@ -51,10 +53,6 @@ ynh_remove_fail2ban_config
 ynh_remove_fpm_config
 ynh_remove_nginx_config
 
-# Reload services
-systemctl restart php5-fpm
-systemctl reload nginx
-
 #=================================================
 # REMOVE DEDICATED USER
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index af83a4a..62b0424 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -26,6 +26,7 @@ DESTDIR="/var/www/$app"
 
 # Retrieve arguments
 domain=$(ynh_app_setting_get "$app" domain)
+
 path_url=$(ynh_app_setting_get "$app" path_url)
 # Compatibility with previous version
 if [ -z "$path_url" ] ; then
@@ -33,34 +34,43 @@ if [ -z "$path_url" ] ; then
   ynh_app_setting_set $app path_url "$path_url"
 fi
 path_url=$(ynh_normalize_url_path $path_url)
+
 final_path=$(ynh_app_setting_get "$app" final_path)
 # Compatibility with previous version
 if [ -z "$final_path" ] ; then
   final_path="/var/www/$app"
   ynh_app_setting_set $app final_path "$final_path"
 fi
+
 db_name=$(ynh_app_setting_get "$app" db_name)
 # Compatibility with previous version
 if [ -z "$db_name" ] ; then
   db_name=$app
   ynh_app_setting_set "$app" db_name "$db_name"
 fi
+
 db_user="$db_name"
 db_pwd=$(ynh_app_setting_get "$app" mysqlpwd)
 admin=$(ynh_app_setting_get "$app" admin)
+
 admin_pwd=$(ynh_app_setting_get "$app" admin_pwd)
-# Compatibility with previous version; password not set
+# Compatibility with previous version; password was not set
 if [ -z "$admin_pwd" ] ; then
   # Generate a new password
-  admin_pwd=$(dd if=/dev/urandom bs=1 count=200 2> /dev/null | tr -c -d 'A-Za-z0-9' | sed -n 's/\(.\{24\}\).*/\1/p')
+  admin_pwd=$(ynh_string_random 24)
+  
   # Compute password hash with the Piwigo function
   cp ../conf/hash_password.php $final_path
   hashed_password=$(cd $final_path ; php hash_password.php $admin_pwd)
+  
   # Update password hash in database
   ynh_mysql_connect_as $db_name $db_pwd $db_user <<< "UPDATE users SET password='$hashed_password' WHERE username='$admin';"
   ynh_app_setting_set $app admin_pwd "$admin_pwd"
+  
+  # Remove the temporary hash generation script
   ynh_secure_remove "$final_path/hash_password.php"
 fi
+
 language=$(ynh_app_setting_get "$app" language)
 if [ "$language" = "fr" ] ; then
   applanguage="fr_FR"
@@ -68,9 +78,8 @@ else
   applanguage="en_UK"
 fi
 
-
-
 is_public=$(ynh_app_setting_get "$app" is_public)
+
 #=================================================
 # MANAGE SCRIPT FAILURE
 #=================================================
@@ -80,11 +89,17 @@ is_public=$(ynh_app_setting_get "$app" is_public)
 if [ -f "/etc/yunohost/apps/$app/scripts/backup" ] ; then
   ynh_backup_before_upgrade # Backup the current version of the app
   ynh_clean_setup () {
-      ynh_backup_after_failed_upgrade
+      ynh_restore_upgradebackup
   }
   ynh_abort_if_errors	# Stop script if an error is detected
 fi
 
+#=================================================
+# INSTALL DEPENDENCIES
+#=================================================
+
+ynh_install_app_dependencies "$pkg_dependencies"
+
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -107,17 +122,37 @@ ynh_system_user_create $app # Create dedicated user if not existing
 # SPECIFIC SETUP
 #=================================================
 
-# Install files and set permissions
-cp -a $TMPDIR/!(upload|galleries) $final_path
+# We store photos (potentially large data) on /home/yunohost.app
+datapath=/home/yunohost.app/$app
+
+# Backward compatibility:
+# If the galleries subdirectory was moved,
+# remove the link and overwrite it
+# (this directory always includes only a single index.php file...)
+if [ -h $final_path/galleries ] ; then
+  rm -f $final_path/galleries # only a symbolic link, ynh_secure_remove can't handle that
+  ynh_secure_remove $datapath/galleries
+fi
+
+# Install files and set permissions
+cp -a $TMPDIR/!(upload|_data) $final_path
+
+
+# Backward compatibility:
+# If the _data subdirectory wasn't already moved to /home/yunohost.app/$app,
+# then move it there
+if [ ! -h $final_path/_data ] ; then
+  mv $final_path/_data $datapath
+  ln -sd $datapath/_data $final_path/_data
+fi
 
-cp -a $TMPDIR/galleries/* $final_path/galleries/
 
 chown -R $app: $final_path
-chown -R $app: /home/yunohost.app/$app
-chmod 755 -R $final_path/galleries
+chown -R $app: $datapath
+chmod 755 -R $final_path/_data
 
 #=================================================
-# NGINX CONFIGURATION
+# NGINX AND PHP-FPM CONFIGURATION
 #=================================================
 
 ynh_add_nginx_config
@@ -126,15 +161,14 @@ ynh_store_file_checksum "/etc/nginx/conf.d/$domain.d/$app.conf"
 # Copy and set php-fpm configuration
 ynh_add_fpm_config
 
-# Set permissions and reload nginx (needed at this stage for the PHP piwigo installation process)
-systemctl reload nginx
-sleep 5s
-systemctl reload php5-fpm
+#=================================================
+# CONFIGURE PIWIGO
+#=================================================
+
 ynh_app_setting_set "$app" unprotected_uris "/"
 yunohost app ssowatconf
 
 # Configure piwigo via curl
-sleep 5s
 ynh_local_curl "/upgrade.php?language=$applanguage&now=true" "language=$applanguage" "username=$admin" "password=$admin_pwd"
 
 # Make a backup of the original config file if modified
@@ -154,6 +188,10 @@ cp ../conf/database.inc.php $final_path/local/config/database.inc.php
 # Calculate and store the database config file checksum
 ynh_store_file_checksum "$final_path/local/config/database.inc.php"
 
+#=================================================
+# ADD LDAP & FAIL2BAN PLUGINS
+#=================================================
+
 # Activate ldap plugin
 ynh_mysql_connect_as $db_name $db_pwd $db_user <<< "UPDATE plugins SET state='active' WHERE id='Ldap_Login';"