diff --git a/README.md b/README.md
index 14850a8..5436898 100644
--- a/README.md
+++ b/README.md
@@ -1,15 +1,16 @@
 # Ghost for YunoHost
 
-[![Integration level](https://dash.yunohost.org/integration/ghost.svg)](https://dash.yunohost.org/appci/app/ghost) ![](https://ci-apps.yunohost.org/ci/badges/ghost.status.svg) ![](https://ci-apps.yunohost.org/ci/badges/ghost.maintain.svg)  
+[![Integration level](https://dash.yunohost.org/integration/ghost.svg)](https://dash.yunohost.org/appci/app/ghost) ![](https://ci-apps.yunohost.org/ci/badges/ghost.status.svg) ![](https://ci-apps.yunohost.org/ci/badges/ghost.maintain.svg)
+
 [![Install Ghost with YunoHost](https://install-app.yunohost.org/install-with-yunohost.svg)](https://install-app.yunohost.org/?app=ghost)
 
-> *This package allows you to install Ghost quickly and simply on a YunoHost server.  
+> *This package allows you to install Ghost quickly and simply on a YunoHost server.
 If you don't have YunoHost, please consult [the guide](https://yunohost.org/#/install) to learn how to install it.*
 
 ## Overview
 Ghost is a fully open source, adaptable platform for building and running a modern online publication.
 
-**Shipped version:** 3.40.5
+**Shipped version:** 3.41.8
 
 ## Screenshots
 
@@ -17,17 +18,17 @@ Ghost is a fully open source, adaptable platform for building and running a mode
 
 ## Installation
 
-### Guidelines 
+### Guidelines
 
  1. No LDAP support.
  1. You need more then **1GB** of ram. If you don't have it, please create a **swap memory**.
- 
+
         $ dd if=/dev/zero of=/swapfile bs=1024 count=1048576
         $ mkswap /swapfile
         $ swapon /swapfile
         $ echo "/swapfile swap swap defaults 0 0" >> /etc/fstab
  1. This app is multi-instance (you can have more then one Ghost blogging websites on a single YunoHost server)
-   
+
 ### Installing the Ghost app
 
  1. **App can be installed by YunoHost admin interface or by the following command:**
diff --git a/conf/admin.src b/conf/admin.src
new file mode 100644
index 0000000..447e425
--- /dev/null
+++ b/conf/admin.src
@@ -0,0 +1,6 @@
+SOURCE_URL=https://github.com/TryGhost/Admin/archive/3.41.8.zip
+SOURCE_SUM=252080e8b4fdc558300b2d33701735a3e2a6d7d82ef66a5eeb9b651a488c67e0
+SOURCE_SUM_PRG=sha256sum
+SOURCE_FORMAT=zip
+SOURCE_IN_SUBDIR=false
+SOURCE_FILENAME=
diff --git a/conf/app.src b/conf/app.src
index 17078a1..f72e94d 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://github.com/TryGhost/Ghost/releases/download/3.40.5/Ghost-3.40.5.zip
-SOURCE_SUM=fef81257937b9125dac1618d4a8433a651aa6d32dcfc69da78a4610d7fcbc8ad
+SOURCE_URL=https://github.com/TryGhost/Ghost/releases/download/3.41.8/Ghost-3.41.8.zip
+SOURCE_SUM=e650e3d55155c5974a8c3e58bf996c523be51b3a38f9728517b14d9114e0106a
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=zip
 SOURCE_IN_SUBDIR=false
diff --git a/conf/config.production.json b/conf/config.production.json
index 57ed83c..d87e81d 100644
--- a/conf/config.production.json
+++ b/conf/config.production.json
@@ -26,4 +26,4 @@
         },
         "transports": ["file", "stdout"]
     }
-}
+}
\ No newline at end of file
diff --git a/manifest.json b/manifest.json
index d0db237..c66dbd1 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Just a blogging platform",
         "fr": "Plateforme de blogging"
     },
-    "version": "3.40.5~ynh1",
+    "version": "3.41.8~ynh1",
     "url": "https://ghost.org/",
     "license": "MIT",
     "maintainer": {
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 3376c2d..ee955e6 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -20,3 +20,56 @@ NODEJS_VERSION=14
 #=================================================
 # FUTURE OFFICIAL HELPERS
 #=================================================
+
+# Send an email to inform the administrator
+#
+# usage: ynh_send_readme_to_admin app_message [recipients]
+# | arg: app_message - The message to send to the administrator.
+# | arg: recipients - The recipients of this email. Use spaces to separate multiples recipients. - default: root
+#	example: "root admin@domain"
+#	If you give the name of a YunoHost user, ynh_send_readme_to_admin will find its email adress for you
+#	example: "root admin@domain user1 user2"
+ynh_send_readme_to_admin() {
+	local app_message="${1:-...No specific information...}"
+	local recipients="${2:-root}"
+
+	# Retrieve the email of users
+	find_mails () {
+		local list_mails="$1"
+		local mail
+		local recipients=" "
+		# Read each mail in argument
+		for mail in $list_mails
+		do
+			# Keep root or a real email address as it is
+			if [ "$mail" = "root" ] || echo "$mail" | grep --quiet "@"
+			then
+				recipients="$recipients $mail"
+			else
+				# But replace an user name without a domain after by its email
+				if mail=$(ynh_user_get_info "$mail" "mail" 2> /dev/null)
+				then
+					recipients="$recipients $mail"
+				fi
+			fi
+		done
+		echo "$recipients"
+	}
+	recipients=$(find_mails "$recipients")
+
+	local mail_subject="☁️🆈🅽🅷☁️: \`$app\` has important message for you"
+
+	local mail_message="This is an automated message from your beloved YunoHost server. Specific information for $app.
+$app_message"
+
+	# Define binary to use for mail command
+	if [ -e /usr/bin/bsd-mailx ]
+	then
+		local mail_bin=/usr/bin/bsd-mailx
+	else
+		local mail_bin=/usr/bin/mail.mailutils
+	fi
+
+	# Send the email to the recipients
+	echo "$mail_message" | $mail_bin -a "Content-Type: text/plain; charset=UTF-8" -s "$mail_subject" "$recipients"
+}
\ No newline at end of file
diff --git a/scripts/install b/scripts/install
index 76d1adb..771c72a 100644
--- a/scripts/install
+++ b/scripts/install
@@ -34,7 +34,7 @@ app=$YNH_APP_INSTANCE_NAME
 #=================================================
 # CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
 #=================================================
-ynh_script_progression --message="Validating installation parameters..."
+ynh_script_progression --message="Validating installation parameters..." --weight=1
 
 final_path=/var/www/$app
 test ! -e "$final_path" || ynh_die --message="This path already contains a folder"
@@ -45,7 +45,7 @@ ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url
 #=================================================
 # STORE SETTINGS FROM MANIFEST
 #=================================================
-ynh_script_progression --message="Storing installation settings..."
+ynh_script_progression --message="Storing installation settings..." --weight=1
 
 ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=path --value=$path_url
@@ -56,7 +56,7 @@ ynh_app_setting_set --app=$app --key=is_public --value=$is_public
 #=================================================
 # FIND AND OPEN A PORT
 #=================================================
-ynh_script_progression --message="Finding an available port..."
+ynh_script_progression --message="Finding an available port..." --weight=1
 
 # Find an available port
 port=$(ynh_find_port --port=4010)
@@ -65,12 +65,12 @@ ynh_app_setting_set --app=$app --key=port --value=$port
 #=================================================
 # INSTALL DEPENDENCIES
 #=================================================
-ynh_script_progression --message="Installing dependencies..."
+ynh_script_progression --message="Installing dependencies..." --weight=1
 
 ynh_install_app_dependencies $pkg_dependencies
 
 # Install Nodejs
-ynh_exec_warn_less ynh_install_nodejs --nodejs_version=$NODEJS_VERSION
+ynh_install_nodejs --nodejs_version=$NODEJS_VERSION
 
 # Install Yarn
 ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
@@ -94,6 +94,9 @@ ynh_script_progression --message="Setting up source files..."
 ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 # Download, check integrity, uncompress and patch the source from app.src
 ynh_setup_source --dest_dir="$final_path"
+# Download, check integrity, uncompress and patch the source from admin.src
+mkdir -p $final_path/core/client/Admin
+ynh_setup_source --dest_dir="$final_path/core/client/Admin" --source_id="admin"
 
 #=================================================
 # NGINX CONFIGURATION
@@ -128,10 +131,10 @@ ynh_script_progression --message="Building $app... (this will take some time and
 pushd "$final_path" || ynh_die
 
 	ynh_use_nodejs
-	yarn install
+	yarn install --non-interactive --silent
 	yarn global add knex-migrator
 	NODE_ENV=production knex-migrator init
-	yarn global add grunt
+	yarn global add grunt-cli ember-cli
 	NODE_ENV=production grunt symlink
 	NODE_ENV=production grunt init --force
 
@@ -180,6 +183,8 @@ then
 	ynh_permission_update --permission="main" --add="visitors"
 fi
 
+ynh_permission_create --permission="admin" --url="/ghost"  --allowed="visitors" --auth_header="false" --protected="true"
+
 #=================================================
 # RELOAD NGINX
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 8630339..91eed7e 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -87,9 +87,9 @@ then
 
 	# Create a temporary directory
 	tmpdir="$(mktemp -d)"
-	
-	# Copy the admin saved settings from tmp directory to final path	
-	cp -ar "$final_path/config.production.json" "$tmpdir/config.production.json"	
+
+	# Copy the admin saved settings from tmp directory to final path
+	cp -ar "$final_path/config.production.json" "$tmpdir/config.production.json"
 
 	# Backup the content folder to the temp dir
 	cp -ar "$final_path/content" "$tmpdir/content"
@@ -99,9 +99,13 @@ then
 
 	# Download, check integrity, uncompress and patch the source from app.src
 	ynh_setup_source --dest_dir=$final_path
-	
-	# Copy the admin saved settings from tmp directory to final path	
-	cp -ar "$tmpdir/config.production.json" "$final_path/config.production.json"	
+
+	# Download, check integrity, uncompress and patch the source from admin.src
+	mkdir -p $final_path/core/client/Admin
+	ynh_setup_source --dest_dir="$final_path/core/client/Admin" --source_id="admin"
+
+	# Copy the admin saved settings from tmp directory to final path
+	cp -ar "$tmpdir/config.production.json" "$final_path/config.production.json"
 
 	# Copy content folder back to the final_path
 	cp -ar "$tmpdir/content" "${final_path}"
@@ -156,13 +160,13 @@ then
 	ynh_script_progression --message="Building $app... (this will take some time and resources!)"
 
 	pushd "$final_path" || ynh_die
-		yarn install 
+		yarn install
 		yarn global add knex-migrator
 		NODE_ENV=production knex-migrator init
 		yarn global add grunt
 		NODE_ENV=production grunt symlink
 		NODE_ENV=production grunt init --force
-		
+
 	popd || ynh_die
 fi