diff --git a/conf/upstream_version b/conf/upstream_version
new file mode 100644
index 0000000..f8bc4c6
--- /dev/null
+++ b/conf/upstream_version
@@ -0,0 +1 @@
+0.1.18
diff --git a/scripts/install b/scripts/install
index 15e656d..8e00081 100755
--- a/scripts/install
+++ b/scripts/install
@@ -8,7 +8,6 @@ app=$YNH_APP_INSTANCE_NAME
 domain=$YNH_APP_ARG_DOMAIN
 path=$YNH_APP_ARG_PATH
 is_public=$YNH_APP_ARG_IS_PUBLIC
-version="0.1.18"
 
 # Source YunoHost helpers
 source /usr/share/yunohost/helpers
@@ -23,6 +22,7 @@ sudo yunohost app checkurl "${domain}${path}" -a "$app" \
 # Retrieve sources and install them
 src_path=/var/www/$app
 sudo mkdir -p $src_path
+version=$(cat ../conf/upstream_version)
 wget -nc --quiet https://github.com/duniter/cesium/releases/download/$version/cesium-web-$version.zip -P /tmp
 sudo unzip -q /tmp/cesium-web-$version.zip -d $src_path
 sudo chown -R www-data: $src_path
diff --git a/scripts/upgrade b/scripts/upgrade
index b0db881..46dbe73 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -11,7 +11,6 @@ app=$YNH_APP_INSTANCE_NAME
 domain=$(ynh_app_setting_get "$app" domain)
 path=$(ynh_app_setting_get "$app" path)
 is_public=$(ynh_app_setting_get "$app" is_public)
-version="0.1.18"
 
 # Remove trailing "/" for next commands
 path=${path%/}
@@ -20,6 +19,7 @@ path=${path%/}
 src_path=/var/www/$app
 sudo rm -rf $src_path
 sudo mkdir -p $src_path
+version=$(cat ../conf/upstream_version)
 wget -nc --quiet https://github.com/duniter/cesium/releases/download/$version/cesium-web-$version.zip -P /tmp
 sudo unzip -q /tmp/cesium-web-$version.zip -d $src_path
 sudo chown -R www-data: $src_path