diff --git a/scripts/upgrade b/scripts/upgrade
index 4098d43..2ebc0c8 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -92,7 +92,7 @@ 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="$final_path"
+	ynh_setup_source --dest_dir="$final_path" --keep="config/config.yml"
 fi
 
 chmod 750 "$final_path"
@@ -123,15 +123,6 @@ ynh_script_progression --message="Upgrading NGINX web server configuration..." -
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
-#=================================================
-# UPDATE A CONFIG FILE
-#=================================================
-ynh_script_progression --message="Updating a configuration file..." --weight=1
-
-ynh_add_config --template="some_config_file" --destination="$final_path/some_config_file"
-chmod 400 "$final_path/some_config_file"
-chown $app:$app "$final_path/some_config_file"
-
 #=================================================
 # RELOAD NGINX
 #=================================================