diff --git a/README.md b/README.md
index 36f3a98..f03b31f 100644
--- a/README.md
+++ b/README.md
@@ -13,10 +13,12 @@ Can be run as Single User Blog or Multi User Instance.
 
 Each User can be limited from 1 to unlimited blogs.
 
-**WriteFreely** require a dedicated **root domain**, eg. writefreely.domain.tld
-
 **Shipped version:** v0.10.0
 
+## Important points to read before installing
+
+**WriteFreely** require a dedicated **root domain**, eg. writefreely.domain.tld
+
 ## Screenshots
 
 ![writefreely-screenshot1](https://user-images.githubusercontent.com/30271971/52228565-fa4ab300-28b2-11e9-8983-3eb8cdbc2262.png)
@@ -65,7 +67,6 @@ If User Mode is configured Multiple users, the app be used by multiple users
 Developers info
 ----------------
 
-**Only if you want to use a testing branch for coding, instead of merging directly into master.**
 Please do your pull request to the [testing branch](https://github.com/YunoHost-Apps/writefreely_ynh/tree/testing).
 
 To try the testing branch, please proceed like that.
diff --git a/conf/arm.src b/conf/arm.src
new file mode 100644
index 0000000..c59cf88
--- /dev/null
+++ b/conf/arm.src
@@ -0,0 +1,6 @@
+SOURCE_URL=https://github.com/writeas/writefreely/releases/download/v0.10.0/writefreely_0.10.0_linux_arm7.tar.gz
+SOURCE_SUM=a746db116272d5ded74cd5556b56ed2f2c4f6af1785f44e6254b63adee0a7d92
+SOURCE_SUM_PRG=sha256sum
+SOURCE_FORMAT=tar.gz
+SOURCE_IN_SUBDIR=false
+SOURCE_FILENAME=
diff --git a/conf/x86-64.src b/conf/x86-64.src
index b7871a7..ab1ad89 100644
--- a/conf/x86-64.src
+++ b/conf/x86-64.src
@@ -1,5 +1,5 @@
 SOURCE_URL=https://github.com/writeas/writefreely/releases/download/v0.10.0/writefreely_0.10.0_linux_amd64.tar.gz
-SOURCE_SUM=6dea841d2f81abd0569915011f183aa818a6f2750da1f953848e05bc49073f3d
+SOURCE_SUM=11498cfc579b94326bdae0b61a992ba4ee3a0200a83920043c1d8ea3bdce8380
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=false
diff --git a/scripts/detect_arch b/scripts/detect_arch
deleted file mode 100644
index ba04b7e..0000000
--- a/scripts/detect_arch
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/bin/bash
-
-if [ -n "$(uname -m | grep arm64)" ] || [ -n "$(uname -m | grep aarch64)" ]; then
-	architecture="arm64"
-elif [ -n "$(uname -m | grep 64)" ]; then
-	architecture="x86-64"
-elif [ -n "$(uname -m | grep 86)" ]; then
-	architecture="i386"
-elif [ -n "$(uname -m | grep arm)" ]; then
-	architecture="arm"
-else
-	ynh_die "Unable to detect your achitecture, please open a bug describing \
-        your hardware and the result of the command \"uname -m\"." 1
-fi
diff --git a/scripts/install b/scripts/install
index 3529a9d..3219d11 100755
--- a/scripts/install
+++ b/scripts/install
@@ -8,7 +8,7 @@
 
 source detect_arch
 source _common.sh
-source detect_arch
+source ynh_detect_arch__2
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -34,9 +34,10 @@ is_public=$YNH_APP_ARG_IS_PUBLIC
 password=$YNH_APP_ARG_PASSWORD
 single_user=$YNH_APP_ARG_SINGLE_USER
 
+architecture=$(ynh_detect_arch)
+
 # Bypass package_checker name not compatible with writefreely
-if [ "$admin" = "package_checker" ]
-then
+if [ ${PACKAGE_CHECK_EXEC:-0} -eq 1 ]; then
 	admin="test"
 fi
 
@@ -47,10 +48,10 @@ app=$YNH_APP_INSTANCE_NAME
 #=================================================
 ynh_print_info --message="Validating installation parameters..."
 
-# Check machine architecture (in particular, we don't support ARM and 32bit machines)
-if [ $architecture == "x86_64" ] || [ $architecture == "arm" ]
+# Check machine architecture, we don't support 32bit machines
+if [ $architecture = "i386" ]
 then
-	ynh_die --message="Sorry, but this app can only be installed on a x86, 64 bits machine :("
+	ynh_die --message="Sorry, but this app cannot be installed on a i386 32 bits machine :("
 fi
 
 final_path=/var/www/$app
diff --git a/scripts/upgrade b/scripts/upgrade
index a05907a..38d7f60 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -8,7 +8,7 @@
 
 source detect_arch
 source _common.sh
-source detect_arch
+source ynh_detect_arch__2
 source ynh_check_app_version_changed
 source /usr/share/yunohost/helpers
 
@@ -28,6 +28,8 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 port=$(ynh_app_setting_get --app=$app --key=port)
 
+architecture=$(ynh_detect_arch)
+
 #=================================================
 # CHECK VERSION
 #=================================================
diff --git a/scripts/ynh_detect_arch__2 b/scripts/ynh_detect_arch__2
new file mode 100644
index 0000000..b1c7375
--- /dev/null
+++ b/scripts/ynh_detect_arch__2
@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# Check the architecture
+#
+# example: architecture=$(ynh_detect_arch)
+#
+# usage: ynh_detect_arch
+#
+# Requires YunoHost version 2.2.4 or higher.
+
+ynh_detect_arch(){
+	local architecture
+	if [ -n "$(uname -m | grep arm64)" ] || [ -n "$(uname -m | grep aarch64)" ]; then
+		architecture="arm64"
+	elif [ -n "$(uname -m | grep 64)" ]; then
+		architecture="x86-64"
+	elif [ -n "$(uname -m | grep 86)" ]; then
+		architecture="i386"
+	elif [ -n "$(uname -m | grep arm)" ]; then
+		architecture="arm"
+	else
+		architecture="unknown"
+	fi
+	echo $architecture
+}