README.md in health-data-standards-3.4.6 vs README.md in health-data-standards-3.5.0

@@ -23,9 +23,13 @@
 Please try to follow the [GitHub Coding Style Guides](https://github.com/styleguide). Additionally, we are switching to the git workflow described in [Juan Batiz-Benet's Gist](https://gist.github.com/jbenet/ee6c9ac48068889b0912). If you are new to the project and would like to make changes, please fork and do your work in a feature branch. Submit a pull request and we'll check to see if it is suitable to be merged in.
 
 Change Log
 ==========
 
+4.0.0 - Not yet released
+
+* Upgrading to mongoid 4
+
 3.4.6 - May 15, 2014
 
 * QRDA Cat I export now exports medical record number if present
 * Measures can now generate prefilter queries to be passed to MongoDB before CQM MapReduce jobs
 * BulkRecordImporter now handles JSON records and has better error handling