CHANGELOG.md in statsd-instrument-3.5.6 vs CHANGELOG.md in statsd-instrument-3.5.7

@@ -4,9 +4,13 @@
 creating a pull request, please add an entry to the "unreleased changes"
 section below.
 
 ## Unreleased changes
 
+## Version 3.5.7
+
+- Improve time measurement to avoid seconds to milliseconds conversions.
+
 ## Version 3.5.6
 
 - Fix issue from 3.5.5 where tests using RSpec matcher for tag assertion would fail, because the matcher as being
   use as an array.