There is no update routine. You need to refresh your pulled repository clone and apply your local changes (if any). Actually there are many ways to merge local changes.
### Step 1, method 1
Stash all local changes, pull changes from the remote master branch and apply your stash on top of it. You will most likely see warnings about non-commited changes; you can ignore them:
- Clone the remote repository again (`git clone https://github.com/mailcow/mailcow-dockerized && cd mailcow-dockerized`). **Pay attention** to this step - the folder must have the same name of the previous one!
When upgrading from a version older than May 13th, 2017 to a version released after that date, you need to run the following command first as network settings have been changed: