diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f572ad..2b2d1de 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## v0.1.5
+
+* Code cleanup
+
 ## v0.1.4
 
 * Added decode options
diff --git a/lib/webp/version.rb b/lib/webp/version.rb
index 4ebfe2f..906742c 100644
--- a/lib/webp/version.rb
+++ b/lib/webp/version.rb
@@ -1,3 +1,3 @@
 module WebP
-  VERSION = "0.1.4"
+  VERSION = "0.1.5"
 end
diff --git a/spec/webp_ffi_spec.rb b/spec/webp_ffi_spec.rb
index 61e2ec4..3efc89c 100644
--- a/spec/webp_ffi_spec.rb
+++ b/spec/webp_ffi_spec.rb
@@ -36,9 +36,9 @@
   end
   after :all do
     @out_dir = File.expand_path(File.join(File.dirname(__FILE__), "../tmp/"))
-    #Dir["#{@out_dir}/*{.png,.webp}"].each do |file|
-    #  File.delete(file) rescue nil
-    #end
+    Dir["#{@out_dir}/*{.png,.webp}"].each do |file|
+      File.delete(file) rescue nil
+    end
   end
 
   it "calculate plus 100 by test_c (verify C)" do