diff --git a/src/flow/oneflow-server.rb b/src/flow/oneflow-server.rb
index b198202171..6a7237aa66 100644
--- a/src/flow/oneflow-server.rb
+++ b/src/flow/oneflow-server.rb
@@ -548,6 +548,9 @@ post '/service_template/:id/action' do
 
                     networks_values << net
                 end
+
+                merge_template ||= {}
+                merge_template['networks_values'] = networks_values
             rescue StandardError
                 return internal_error('Wrong networks format', VALIDATION_EC)
             end