CHANGELOG.md in frontkick-0.5.3 vs CHANGELOG.md in frontkick-0.5.4

@@ -1,4 +1,10 @@
+# 0.5.4 (2017/01/12)
+
+Enhancements:
+
+- Support env argument
+
 # 0.5.3 (2017/01/12)
 
 Fixes:
 
 - Fix not to close given out and err IO objects