diff --git a/scripts/upgrade b/scripts/upgrade
index d710d77..46211b6 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -40,12 +40,12 @@ then
 	ynh_script_progression --message="Upgrading source files..." --weight=1
 
 	# Download, check integrity, uncompress and patch the source from app.src
-	ynh_setup_source --dest_dir="$install_dir/build"
+	ynh_setup_source --dest_dir="$install_dir/build" --full_replace=1
 fi
 
 # $install_dir will automatically be initialized with some decent
 # permission by default ... however, you may need to recursively reapply
-# ownership to all files such as after the ynh_setup_source step
+# ownership to all files such as after the ynh_setup_source step --full_replace=1
 chown -R $app:www-data "$install_dir"
 
 #=================================================