diff --git a/ChangeLog.md b/ChangeLog.md
index 8ad78ff..bfc56fe 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,8 @@
+### 0.1.5 / 2014-12-12
+
+* Fix Frames#concat and two other method to return self.
+* Some internal changes.
+
 ### 0.1.4 / 2014-04-10
 
 * Added an enumerator style on AviGlitch::Base#glitch and
diff --git a/README.md b/README.md
index 2a50200..5034c63 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,8 @@ It creates the keyframes removed video.
   $ datamosh /path/to/your.avi -o /path/to/broken.avi
 ```
 
+For more practical usages, please check <https://github.com/ucnv/aviglitch-utils/tree/master/bin>.
+
 ## Installation
 
 ```sh
diff --git a/aviglitch.gemspec b/aviglitch.gemspec
index 34d28bf..8b6b34f 100644
--- a/aviglitch.gemspec
+++ b/aviglitch.gemspec
@@ -8,11 +8,8 @@ Gem::Specification.new do |spec|
   spec.version       = AviGlitch::VERSION
   spec.authors       = ["ucnv"]
   spec.email         = ["ucnvvv@gmail.com"]
-  spec.description   = %q{AviGlitch destroys your AVI files.
-    This library provides ways to manipulate data in each AVI frames.
-    It can easily generate keyframes-removed video known as "datamoshing".
-  }
   spec.summary       = %q{A Ruby library to destroy your AVI files.}
+  spec.description   = spec.summary
   spec.homepage      = "http://ucnv.github.com/aviglitch/"
   spec.license       = "MIT"
 
diff --git a/lib/aviglitch.rb b/lib/aviglitch.rb
index 7d9b882..9c58531 100644
--- a/lib/aviglitch.rb
+++ b/lib/aviglitch.rb
@@ -31,7 +31,7 @@
 #
 module AviGlitch
 
-  VERSION = '0.1.4'
+  VERSION = '0.1.5'
 
   BUFFER_SIZE = 2 ** 24