将django 1.4项目升级到1.8版本

I am new to django and i have a django 1.4 version project. i am trying to run it in django 1.8 environment. I'd like to upgrade my 1.4 project to 1.8 without rewriting the project. If someone knows a way to do this please help me. I tried surfing for answers but couldn't find any. I am new to django and i have a django 1.4 vers