CHANGELOG.md in logstash-logger-0.18.0 vs CHANGELOG.md in logstash-logger-0.18.1

@@ -1,4 +1,8 @@
+## 0.18.1
+
+- Fixes usage of ActiveSupport without Rails. [#90](https://github.com/dwbutler/logstash-logger/pull/90)
+
 ## 0.18.0
 
 This release removes the dependency on `stud` and vendors in a forked version
 of `Stud::Buffer`. This improves the buffering behavior of LogStashLogger by
 flushing all log messages in a background thread by default. This eliminates