CHANGELOG in prometheus_exporter-0.4.8 vs CHANGELOG in prometheus_exporter-0.4.9

@@ -1,4 +1,8 @@
+0.4.9 - 11-04-2019
+
+- Fix: Gem was not working correctly in Ruby 2.4 and below due to a syntax error
+
 0.4.8 - 10-04-2019
 
 - Feature: added helpers for instrumenting unicorn using raindrops
 
 0.4.7 - 08-04-2019