CHANGELOG.md in statsd-instrument-3.9.3 vs CHANGELOG.md in statsd-instrument-3.9.4

@@ -4,12 +4,17 @@
 creating a pull request, please add an entry to the "unreleased changes"
 section below.
 
 ## Unreleased changes
 
+## Version 3.9.4
+
+- [#384](https://github.com/Shopify/statsd-instrument/pull/384) - Aggregation: fixing bug when sending metrics synchronously
+e.g. when the main thread is killed and we are forced to flush the metrics.
+
 ## Version 3.9.3
 
-- [#384](https://github.com/Shopify/statsd-instrument/pull/382) - Fix warnings in Rubocop cops.
+- [#382](https://github.com/Shopify/statsd-instrument/pull/382) - Fix warnings in Rubocop cops.
 
 ## Version 3.9.2
 
 - [#381](https://github.com/Shopify/statsd-instrument/pull/381) - Reduce log level of some messages inside new Aggregator
 to avoid contention and verbosity.