CHANGELOG.markdown in image_optim-0.20.0 vs CHANGELOG.markdown in image_optim-0.20.1

@@ -1,8 +1,12 @@
 # ChangeLog
 
 ## unreleased
 
+## v0.20.1 (2014-12-19)
+
+* Fix [paperclip-optimizer issue #13](https://github.com/janfoeh/paperclip-optimizer/issues/13): railtie broken with `undefined local variable or method 'app'` [#72](https://github.com/toy/image_optim/issues/72) [@janfoeh](https://github.com/janfoeh)
+
 ## v0.20.0 (2014-12-15)
 
 * Ignore and show warning for lossy options `jpegoptim#max_quality` and `pngquant#quality` in default/lossless mode [#71](https://github.com/toy/image_optim/issues/71) [@toy](https://github.com/toy)
 * Add `:blacken` option to `pngcrush` worker, to blacken fully transparent pixels, on by default [@toy](https://github.com/toy)
 * Command line option `--no-progress` to disable showing progress of optimizing images [@toy](https://github.com/toy)