diff --git a/manifest.json b/manifest.json
index 62e2d0e..7cb8d59 100644
--- a/manifest.json
+++ b/manifest.json
@@ -14,7 +14,7 @@
         "email": "misterl56@hotmail.com"
     },
     "requirements": {
-        "yunohost": ">= 4.1.7"
+        "yunohost": ">= 4.2.0"
     },
     "multi_instance": false,
     "services": [
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 1fc5425..9d496ef 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -14,86 +14,3 @@ pkg_dependencies="p7zip"
 #=================================================
 # EXPERIMENTAL HELPERS
 #=================================================
-
-#=================================================
-# FUTURE OFFICIAL HELPERS
-#=================================================
-
-# Install or update the main directory yunohost.multimedia
-#
-# usage: ynh_multimedia_build_main_dir
-ynh_multimedia_build_main_dir () {
-        local ynh_media_release="v1.2"
-        local checksum="806a827ba1902d6911095602a9221181"
-
-        # Download yunohost.multimedia scripts
-        wget -nv https://github.com/Yunohost-Apps/yunohost.multimedia/archive/${ynh_media_release}.tar.gz 2>&1
-
-        # Check the control sum
-        echo "${checksum} ${ynh_media_release}.tar.gz" | md5sum -c --status \
-                || ynh_die "Corrupt source"
-
-	# Check if the package acl is installed. Or install it.
-	ynh_package_is_installed 'acl' \
-		|| ynh_package_install acl
-
-        # Extract
-        mkdir yunohost.multimedia-master
-        tar -xf ${ynh_media_release}.tar.gz -C yunohost.multimedia-master --strip-components 1
-        ./yunohost.multimedia-master/script/ynh_media_build.sh
-}
-
-# Add a directory in yunohost.multimedia
-# This "directory" will be a symbolic link to a existing directory.
-#
-# usage: ynh_multimedia_addfolder "Source directory" "Destination directory"
-#
-# | arg: -s, --source_dir= - Source directory - The real directory which contains your medias.
-# | arg: -d, --dest_dir= - Destination directory - The name and the place of the symbolic link, relative to "/home/yunohost.multimedia"
-ynh_multimedia_addfolder () {
-	# Declare an array to define the options of this helper.
-	declare -Ar args_array=( [s]=source_dir= [d]=dest_dir= )
-	local source_dir
-	local dest_dir
-	# Manage arguments with getopts
-	ynh_handle_getopts_args "$@"
-
-	./yunohost.multimedia-master/script/ynh_media_addfolder.sh --source="$source_dir" --dest="$dest_dir"
-}
-
-# Move a directory in yunohost.multimedia, and replace by a symbolic link
-#
-# usage: ynh_multimedia_movefolder "Source directory" "Destination directory"
-#
-# | arg: -s, --source_dir= - Source directory - The real directory which contains your medias.
-# It will be moved to "Destination directory"
-# A symbolic link will replace it.
-# | arg: -d, --dest_dir= - Destination directory - The new name and place of the directory, relative to "/home/yunohost.multimedia"
-ynh_multimedia_movefolder () {
-	# Declare an array to define the options of this helper.
-	declare -Ar args_array=( [s]=source_dir= [d]=dest_dir= )
-	local source_dir
-	local dest_dir
-	# Manage arguments with getopts
-	ynh_handle_getopts_args "$@"
-
-	./yunohost.multimedia-master/script/ynh_media_addfolder.sh --inv --source="$source_dir" --dest="$dest_dir"
-}
-
-# Allow an user to have an write authorisation in multimedia directories
-#
-# usage: ynh_multimedia_addaccess user_name
-#
-# | arg: -u, --user_name= - The name of the user which gain this access.
-ynh_multimedia_addaccess () {
-	# Declare an array to define the options of this helper.
-	declare -Ar args_array=( [u]=user_name=)
-	local user_name
-	# Manage arguments with getopts
-	ynh_handle_getopts_args "$@"
-
-	groupadd -f multimedia
-	usermod -a -G multimedia $user_name
-}
-
-