diff --git a/conf/app-upgrade.src b/conf/app-upgrade.src
new file mode 100644
index 0000000..08afa35
--- /dev/null
+++ b/conf/app-upgrade.src
@@ -0,0 +1,6 @@
+SOURCE_URL=https://github.com/getgrav/grav/releases/download/1.5.1/grav-update-v1.5.1.zip
+SOURCE_SUM=D1D1BD1937848F54A707778DCF315EB17D95A3D9094DCC4189F0189C4824FC7C
+SOURCE_SUM_PRG=sha256sum
+SOURCE_FORMAT=zip
+SOURCE_IN_SUBDIR=true
+SOURCE_FILENAME=
diff --git a/scripts/upgrade b/scripts/upgrade
index 8081797..c054c34 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -67,16 +67,14 @@ ynh_abort_if_errors
 # Normalize the URL path syntax
 path_url=$(ynh_normalize_url_path $path_url)
 
-
-
 #=================================================
 # STANDARD UPGRADE STEPS
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
 
-# Download, check integrity, uncompress and patch the source from app.src
-ynh_setup_source "$final_path"
+# Download, check integrity, uncompress and patch the source from app-upgrade.src
+ynh_setup_source "$final_path" "app-upgrade"
 
 #=================================================
 # NGINX CONFIGURATION
@@ -105,14 +103,13 @@ ynh_system_user_create "$app"
 # Create a dedicated php-fpm config
 ynh_add_fpm_config
 
-chown -R "$app": "$final_path"
-
 #=================================================
 # GENERIC FINALIZATION
 #=================================================
 # SECURE FILES AND DIRECTORIES
 #=================================================
 
+chown -R "$app": "$final_path"
 
 #=================================================
 # SETUP SSOWAT
@@ -131,4 +128,4 @@ fi
 # RELOAD NGINX
 #=================================================
 
-systemctl reload nginx
\ No newline at end of file
+systemctl reload nginx