diff --git a/manifest.json b/manifest.json
index 4b4528e..82b83a9 100644
--- a/manifest.json
+++ b/manifest.json
@@ -14,7 +14,7 @@
         "email": "alex.aubin@mailoo.org"
     },
     "requirements": {
-        "yunohost": ">= 3.0.0"
+        "yunohost": ">= 3.5.0"
     },
     "multi_instance": false,
     "services": [
diff --git a/scripts/install b/scripts/install
index 203daa2..e5c9550 100644
--- a/scripts/install
+++ b/scripts/install
@@ -36,6 +36,7 @@ fi
 #=================================================
 # CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
 #=================================================
+ynh_script_progression --message="Validating installation parameters..." --weight=1
 
 # Register (book) web path
 ynh_webpath_register $app $domain $path_url
@@ -46,6 +47,7 @@ test ! -e "$final_path" || ynh_die "This path already contains a folder"
 #=================================================
 # STORE SETTINGS FROM MANIFEST
 #=================================================
+ynh_script_progression --message="Storing installation settings..." --weight=1
 
 ynh_app_setting_set $app is_public $is_public
 ynh_app_setting_set $app final_path $final_path
@@ -53,17 +55,19 @@ ynh_app_setting_set $app final_path $final_path
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
+ynh_script_progression --message="Setting up source files..." --weight=1
 
 # Download, check integrity, uncompress and patch the source from app.src
 # For this app sources are in app subdirectory
 ynh_setup_source "$final_path"
 
 # Set permissions to phpsysinfo directory
-sudo chown -R www-data: "$final_path"
+chown -R www-data: "$final_path"
 
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
+ynh_script_progression --message="Configuring nginx web server..." --weight=1
 
 # Create a dedicated nginx config
 ynh_add_nginx_config
@@ -71,6 +75,7 @@ ynh_add_nginx_config
 #=================================================
 # SETUP SSOWAT
 #=================================================
+ynh_script_progression --message="Configuring SSOwat..." --weight=1
 
 # Make app public if necessary or protect it
 if [ $is_public -eq 1 ]
@@ -82,5 +87,8 @@ fi
 #=================================================
 # RELOAD NGINX
 #=================================================
+ynh_script_progression --message="Reloading nginx web server..." --weight=1
 
 systemctl reload nginx
+
+ynh_script_progression --message="Installation of $app completed" --last
diff --git a/scripts/remove b/scripts/remove
index 80f7283..9b37d5e 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -11,6 +11,7 @@ source /usr/share/yunohost/helpers
 #=================================================
 # LOAD SETTINGS
 #=================================================
+ynh_script_progression --message="Loading installation settings..." --weight=1
 
 app=$YNH_APP_INSTANCE_NAME
 domain=$(ynh_app_setting_get "$app" domain)
@@ -19,13 +20,17 @@ final_path=$(ynh_app_setting_get "$app" final_path)
 #=================================================
 # REMOVE THE MAIN DIR OF THE APP
 #=================================================
+ynh_script_progression --message="Removing app main directory..." --weight=1
 
 # Remove sources
-ynh_secure_remove "$final_path"
+ynh_secure_remove --file="$final_path"
 
 #=================================================
 # REMOVE THE NGINX CONFIGURATION
 #=================================================
+ynh_script_progression --message="Removing nginx web server configuration..." --weight=1
 
 ynh_remove_nginx_config
 systemctl reload nginx
+
+ynh_script_progression --message="Removal of $app completed" --last