diff --git a/HISTORY.md b/HISTORY.md
index e1367ec..003658d 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,8 +1,8 @@
 Sanitize History
 ================================================================================
 
-Version 4.0.1 (git)
--------------------
+Version 4.0.1 (2015-12-09)
+--------------------------
 
 * Unpinned the Nokogumbo dependency. [@rubys - #141][141]
 
diff --git a/lib/sanitize/version.rb b/lib/sanitize/version.rb
index 2abf5f2..d463b2e 100644
--- a/lib/sanitize/version.rb
+++ b/lib/sanitize/version.rb
@@ -1,5 +1,5 @@
 # encoding: utf-8
 
 class Sanitize
-  VERSION = '4.0.0'
+  VERSION = '4.0.1'
 end