diff --git a/CHANGELOG.md b/CHANGELOG.md
index c792bec..b66c905 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Molinillo Changelog
 
-## Master
+## 0.6.6 (2018-08-07)
 
 ##### Enhancements
 
diff --git a/Gemfile.lock b/Gemfile.lock
index e8265d4..d12b9b1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    molinillo (0.6.5)
+    molinillo (0.6.6)
 
 GEM
   remote: https://rubygems.org/
@@ -99,4 +99,4 @@ DEPENDENCIES
   rubocop
 
 BUNDLED WITH
-   1.16.1
+   1.16.3
diff --git a/lib/molinillo/gem_metadata.rb b/lib/molinillo/gem_metadata.rb
index 3faa984..4cab281 100644
--- a/lib/molinillo/gem_metadata.rb
+++ b/lib/molinillo/gem_metadata.rb
@@ -2,5 +2,5 @@
 
 module Molinillo
   # The version of Molinillo.
-  VERSION = '0.6.5'.freeze
+  VERSION = '0.6.6'.freeze
 end