diff --git a/conf/init_calibre_db_ldap_settings b/conf/init_calibre_db_ldap_settings
index 6652c9f..b0f6871 100644
--- a/conf/init_calibre_db_ldap_settings
+++ b/conf/init_calibre_db_ldap_settings
@@ -2,8 +2,8 @@ config_login_type=1,
 config_ldap_provider_url=\'localhost\',
 config_ldap_port=389,
 config_ldap_schema=\'ldap\',
-config_ldap_serv_username=\'toto\',
-config_ldap_serv_password=\'titi\',
+config_ldap_serv_username=\'nicolas\',
+config_ldap_serv_password=\'eXVub2hvc3RfZGV2\',
 config_ldap_dn=\'ou=users,dc=yunohost,dc=org\',
 config_ldap_user_object=\'uid=%s\',
 config_ldap_openldap=1
\ No newline at end of file
diff --git a/conf/init_calibre_db_settings b/conf/init_calibre_db_settings
index 2853f5d..24690a0 100644
--- a/conf/init_calibre_db_settings
+++ b/conf/init_calibre_db_settings
@@ -8,7 +8,7 @@ config_use_goodreads=0,
 config_logfile=\'\',
 config_converterpath=\'\',
 config_calibre=\'\',
-config_logfile=\'/var/log/calibreweb/calibreweb.log\',
+config_logfile=\'$LOG_FILE\',
 config_access_log=1,
-config_access_logfile=\'/var/log/calibreweb/calibreweb-access.log\',
+config_access_logfile=\'$ACCESS_LOG_FILE\',
 config_uploading=\'$upload\'
\ No newline at end of file
diff --git a/conf/systemd.service b/conf/systemd.service
index 4b60a68..d166c60 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -7,7 +7,7 @@ Type=simple
 User=__APP__
 Group=__APP__
 WorkingDirectory=__FINALPATH__/
-ExecStart=/bin/sh -c '/usr/bin/python __FINALPATH__/cps.py'
+ExecStart=/bin/sh -c '/usr/bin/python3.5 __FINALPATH__/cps.py'
 
 [Install]
 WantedBy=multi-user.target
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 6d2551a..349ee53 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -1,9 +1,5 @@
 #!/bin/bash
 
-PKG_DEPENDENCIES="sqlite3 python-pip imagemagick"
-DOSSIER_MEDIA=/home/yunohost.multimedia
-create_dir=0
-
 get_db() {
         # $1 = nom de la table
         # cette ligne de malade : 
@@ -20,84 +16,6 @@ get_db() {
 # TO BE DELETED WHEN RELEASED
 #=================================================
 
-#=================================================
-#YNH_SYSTEMD_ACTION
-#=================================================
-
-# Start (or other actions) a service,  print a log in case of failure and optionnaly wait until the service is completely started
-#
-# usage: ynh_system_reload service_name [action]
-# | arg: -n, --service_name= - Name of the service to reload. Default : $app
-# | arg: -a, --action=       - Action to perform with systemctl. Default: start
-# | arg: -l, --line_match=   - Line to match - The line to find in the log to attest the service have finished to boot.
-#                              If not defined it don't wait until the service is completely started.
-# | arg: -p, --log_path=     - Log file - Path to the log file. Default : /var/log/$app/$app.log
-# | arg: -t, --timeout=      - Timeout - The maximum time to wait before ending the watching. Default : 300 seconds.
-# | arg: -e, --length=       - Length of the error log : Default : 20
-ynh_systemd_action() {
-    # Declare an array to define the options of this helper.
-    declare -Ar args_array=( [n]=service_name= [a]=action= [l]=line_match= [p]=log_path= [t]=timeout= [e]=length= )
-    local service_name
-    local action
-    local line_match
-    local length
-    local log_path
-    local timeout
-
-    # Manage arguments with getopts
-    ynh_handle_getopts_args "$@"
-
-    local service_name="${service_name:-$app}"
-    local action=${action:-start}
-    local log_path="${log_path:-/var/log/$service_name/$service_name.log}"
-    local length=${length:-20}
-    local timeout=${timeout:-300}
-    local wait_starting=true
-
-    if [[ -z "${line_match:-}" ]]
-    then
-        wait_starting=false
-    fi
-
-    ynh_clean_check_starting () {
-        # Stop the execution of tail.
-        kill -s 15 $pid_tail 2>&1
-        ynh_secure_remove "$templog" 2>&1
-    }
-
-    echo "Starting of $service_name" >&2
-    systemctl $action $service_name || ( journalctl --lines=$length -u $service_name >&2 && false)
-
-    if $wait_starting
-    then
-        # Following the starting of the app in its log
-        local templog="$(mktemp)"
-        tail -F -n1 "$log_path" > "$templog" &
-        # Get the PID of the tail command
-        local pid_tail=$!
-
-        local i=0
-        for i in $(seq 1 $timeout)
-        do
-            # Read the log until the sentence is found, that means the app finished to start. Or run until the timeout
-            if grep --quiet "$line_match" "$templog"
-            then
-                echo "The service $service_name has correctly started." >&2
-                break
-            fi
-            echo -n "." >&2
-            sleep 1
-        done
-        if [ $i -eq $timeout ]
-        then
-            echo "The service $service_name didn't fully started before the timeout." >&2
-            journalctl --lines=$length -u $service_name >&2
-        fi
-
-        echo ""
-        ynh_clean_check_starting
-    fi
-}
 
 
 #=================================================
diff --git a/scripts/_settings.sh b/scripts/_settings.sh
new file mode 100644
index 0000000..79faedc
--- /dev/null
+++ b/scripts/_settings.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+PKG_DEPENDENCIES="sqlite3 python3-pip imagemagick"
+DOSSIER_MEDIA=/home/yunohost.multimedia
+create_dir=0
+LOG_FILE=/var/log/$app/$app.log
+ACCESS_LOG_FILE=/var/log/$app/$app-access.log
\ No newline at end of file
diff --git a/scripts/install b/scripts/install
index 91c7b31..f91a11b 100755
--- a/scripts/install
+++ b/scripts/install
@@ -32,6 +32,8 @@ public_library=$7
 if [ $is_public -eq 1 ]; then
 	public_library=1
 fi
+source _settings.sh
+
 
 #=================================================
 # CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
@@ -86,8 +88,8 @@ ynh_setup_source "$final_path"
 
 ynh_print_info "Installing dependencies and pip packages"
 ynh_install_app_dependencies $PKG_DEPENDENCIES
-pip install --target $final_path/vendor -r $final_path/requirements.txt
-pip install --target $final_path/vendor -r $final_path/optional-requirements.txt
+pip3 install --no-cache-dir --target $final_path/vendor -r $final_path/requirements.txt
+pip3 install --no-cache-dir --upgrade --target $final_path/vendor -r $final_path/optional-requirements.txt
 
 #=================================================
 # NGINX CONFIGURATION
@@ -162,15 +164,17 @@ chown -R $app:$app /var/log/$app
 
 ynh_print_info "Setting up database and settings"
 #we need to start and stop the service so that initial app.db file is created and that we can set default data
-ynh_systemd_action -l "INFO in server: Starting Gevent server"
+ynh_systemd_action
 
 #sleep required on low spec like raspberryPi
-sleep 2s
+sleep 5s
 ynh_systemd_action -a stop
 
 
 #set database settings as per conf file
-conf="\"UPDATE settings SET $(. <(echo -E echo $(<../conf/init_calibre_db_settings))) $(. <(echo -E echo $(<../conf/init_calibre_db_ldap_settings))) WHERE ID=1\""
+#insertion of dummy value for config_ldap_serv_username and config_ldap_serv_password : required for calibreweb and simpleldap but not
+#required by Yunohost ldap.
+conf="\"UPDATE settings SET $(. <(echo -E echo $(<../conf/init_calibre_db_settings))), $(. <(echo -E echo $(<../conf/init_calibre_db_ldap_settings))) WHERE ID=1\""
 eval sqlite3 $final_path/app.db "$conf"
 
 conf="\"UPDATE user SET $(. <(echo -E echo $(<../conf/init_calibre_db_user))) WHERE ID=1\""
@@ -241,7 +245,8 @@ yunohost service add $app --log "/var/log/$app/$app.log"
 if [ $is_public -eq 1 ]
 then
 	# unprotected_uris allows SSO credentials to be passed anyway.
-	ynh_app_setting_set $app unprotected_uris "/"
+	#ynh_app_setting_set $app unprotected_uris "/"
+	ynh_permission_update --permission "main" --add visitors
 fi
 if [ $public_library -eq 0 ]; then
 	yunohost app addaccess $app -u $admin
diff --git a/scripts/restore b/scripts/restore
index 4f9c05f..c1ea009 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -89,7 +89,8 @@ chown -R $app: $final_path
 # Define and install dependencies
 ynh_print_info "Installing dependencies and pip packages"
 ynh_install_app_dependencies $PKG_DEPENDENCIES
-pip install --target $final_path/vendor -r $final_path/requirements.txt
+#pip package not required as already in app directory
+#pip install --target $final_path/vendor -r $final_path/requirements.txt
 
 #=================================================
 # ADVERTISE SERVICE IN ADMIN PANEL
diff --git a/scripts/upgrade b/scripts/upgrade
index 0c037a6..243e4ce 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -80,7 +80,8 @@ ynh_add_nginx_config
 #=================================================
 ynh_print_info "Download and install dependencies"
 ynh_install_app_dependencies $PKG_DEPENDENCIES
-pip install --target $final_path/vendor -r $final_path/requirements.txt
+pip3 install --no-cache-dir --target $final_path/vendor -r $final_path/requirements.txt
+pip3 install --no-cache-dir --target $final_path/vendor -r $final_path/optional-requirements.txt
 
 #=================================================
 # CREATE DEDICATED USER
@@ -111,9 +112,9 @@ ynh_multimedia_addaccess $app
 ynh_backup_if_checksum_is_different "$final_path/app.db"
 
 #set database settings as per conf file : restart server so that app.db is regenerated, then add new ldap settings
-ynh_systemd_action -l "INFO in server: Starting Gevent server"
+ynh_systemd_action
 #sleep required on low spec like raspberryPi
-sleep 2s
+sleep 5s
 ynh_systemd_action -a stop
 
 conf="\"UPDATE settings SET $(. <(echo -E echo $(<../conf/init_calibre_db_ldap_settings))) WHERE ID=1\""
@@ -153,7 +154,8 @@ chown -R $app: $final_path
 if [ $is_public -eq 1 ]
 then
 	# unprotected_uris allows SSO credentials to be passed anyway
-	ynh_app_setting_set $app unprotected_uris "/"
+	#ynh_app_setting_set $app unprotected_uris "/"
+	ynh_permission_update --permission "main" --add visitors
 fi
 
 #=================================================
@@ -169,4 +171,4 @@ fi
 #=================================================
 
 systemctl reload nginx
-ynh_systemd_action -a restart -l "INFO in server: Starting Gevent server"
+ynh_systemd_action -a restart
diff --git a/sources/patches/app-optional-requirements.patch b/sources/patches/app-optional-requirements.patch
new file mode 100644
index 0000000..1088286
--- /dev/null
+++ b/sources/patches/app-optional-requirements.patch
@@ -0,0 +1,37 @@
+--- a/optional-requirements.txt	2020-02-23 09:08:01.000000000 +0100
++++ b/optional-requirements.txt	2020-04-13 10:50:30.317525119 +0200
+@@ -1,34 +1,3 @@
+-# GDrive Integration
+-google-api-python-client==1.7.11,<1.8.0
+-gevent>=1.2.1,<1.5.0
+-greenlet>=0.4.12,<0.5.0
+-httplib2>=0.9.2,<0.18.0
+-oauth2client>=4.0.0,<4.14.0
+-uritemplate>=3.0.0,<3.1.0
+-pyasn1-modules>=0.0.8,<0.3.0
+-pyasn1>=0.1.9,<0.5.0
+-PyDrive>=1.3.1,<1.14.0
+-PyYAML>=3.12
+-rsa==3.4.2,<4.1.0
+-six>=1.10.0,<1.14.0
+-
+-# goodreads
+-goodreads>=0.3.2,<0.4.0
+-python-Levenshtein>=0.12.0,<0.13.0
+-
+ # ldap login
+ python_ldap>=3.0.0,<3.3.0
+ flask-simpleldap>1.3.0,<1.5.0
+-
+-#oauth
+-flask-dance>=0.13.0
+-sqlalchemy_utils>=0.33.5,<0.37.0
+-
+-# extracting metadata
+-lxml>=3.8.0,<4.6.0
+-Pillow>=4.0.0,<7.1.0
+-rarfile>=2.7
+-
+-# other
+-natsort>=2.2.0,<7.1.0
+-git+https://github.com/OzzieIsaacs/comicapi.git@ad8bfe5a1c31db882480433f86db2c5c57634a3f#egg=comicapi