diff --git a/scripts/change_url b/scripts/change_url
index f8d06ff..9afe639 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -101,12 +101,6 @@ then
     ynh_store_file_checksum --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"
 fi
 
-#=================================================
-# SPECIFIC MODIFICATIONS
-#=================================================
-# ...
-#=================================================
-
 #=================================================
 # RELOAD NGINX
 #=================================================
diff --git a/scripts/install b/scripts/install
index 1095955..6c75f8b 100755
--- a/scripts/install
+++ b/scripts/install
@@ -26,8 +26,7 @@ path_url=$YNH_APP_ARG_PATH
 admin=$YNH_APP_ARG_ADMIN
 is_public=$YNH_APP_ARG_IS_PUBLIC
 random_key=$(ynh_string_random --length=32)
-
-email=$(ynh_user_get_info $admin 'mail')
+email=$(ynh_user_get_info --username=$admin --key=mail)
 
 app=$YNH_APP_INSTANCE_NAME
 
@@ -198,8 +197,6 @@ ynh_script_progression --message="Configuring permissions..."
 # Make app public if necessary
 if [ $is_public -eq 1 ]
 then
-	# Everyone can access the app.
-	# The "main" permission is automatically created before the install script.
 	ynh_permission_update --permission="main" --add="visitors"
 fi
 
diff --git a/scripts/upgrade b/scripts/upgrade
index c8eb570..ccac2ed 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -25,7 +25,7 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
 random_key=$(ynh_app_setting_get --app=$app --key=random_key)
-email=$(ynh_user_get_info $admin 'mail')
+email=$(ynh_user_get_info --username=$admin --key=mail)
 
 #=================================================
 # CHECK VERSION
@@ -104,18 +104,15 @@ then
 	cp -a "$final_path/storage/export/" "$tmpdir/storage/export/"
 	ynh_secure_remove --file="$final_path"
 
-
 	# Download, check integrity, uncompress and patch the source from app.src
 	ynh_setup_source --dest_dir="$final_path"
 
 	# Restore the config file
 	cp -a "$tmpdir/storage/upload/" "$final_path/storage/upload/"
 	cp -a "$tmpdir/storage/export/"  "$final_path/storage/export/"
-	cp -a  "$tmpdir/.env" "$final_path/.env"
+	cp -a "$tmpdir/.env" "$final_path/.env"
 	# Remove temporary directory
 	ynh_secure_remove --file="$tmpdir"
-
-
 fi
 
 #=================================================
@@ -157,7 +154,7 @@ phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
 #=================================================
 ynh_script_progression --message="Updating PHP dependencies..."
 
-chown -R $app: "$final_path"
+chown -R $app: $final_path
 
 ynh_exec_warn_less ynh_install_composer --phpversion="$phpversion" --workdir="$final_path"
 
@@ -199,15 +196,12 @@ ynh_store_file_checksum --file="$config"
 ynh_script_progression --message="Deploying..."
 
 pushd "$final_path"
-
-	rm -rf bootstrap/cache/*
+	ynh_secure_remove --file="bootstrap/cache/*"
 	php$phpversion artisan cache:clear
 	php$phpversion artisan migrate --seed
 	php$phpversion artisan firefly-iii:upgrade-database
 	php$phpversion artisan passport:install
 	php$phpversion artisan cache:clear
-
-
 popd
 
 #=================================================
@@ -227,7 +221,7 @@ ynh_script_progression --message="Securing files and directories..."
 
 # Set permissions on app files
 chown -R $app: $final_path
-chmod -R 775 ${final_path}/storage
+chmod -R 775 $final_path/storage
 
 #=================================================
 # SETUP A CRON