CHANGELOG.md in middleman-webp-0.4.0 vs CHANGELOG.md in middleman-webp-0.4.1

- old
+ new

@@ -1,4 +1,7 @@
+## 0.4.1
+
+- Fix running external conversion tool
 
 ## 0.4.0
 
 - Middleman 4.0.0 compatibility
 - *Breaks* Middleman 3.*.* support, use gem version 0.3.2 with older