service/survey.md

@@ -36,6 +36,7 @@ Instead, we deploy from the latest stable zip-file release using Puppet.
 
 The steps to upgrade LimeSurvey are:
 
+ 0. Review the LimeSurvey upstream [changelog](https://github.com/LimeSurvey/LimeSurvey/blob/master/docs/release_notes.txt)
  1. Login to `survey-01`, stop Puppet using `puppet agent --disable "pending LimeSurvey upgrade"`
  2. Open the [LimeSurvey latest stable release page][] and note the version
     number and sha256 checksum