update changelog

Author: mafintosh

CHANGELOG.md

@@ -10,6 +10,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
   ### Added, ### Changed, ### Fixed, ### Removed, ### Deprecated
 -->
 
+## 3.5.5 - 2017-06-19
+### Fixed
+* The stats tracking should work with much less issues now (https://github.com/datproject/dat-node/pull/175, https://github.com/datproject/dat-node/pull/176)
+
 ## 3.5.0 - 2017-06-19
 ### Added
 * Serve archives over http (https://github.com/datproject/dat-node/pull/160)