diff --git a/HISTORY.md b/HISTORY.md
index 0676efa..36b7a74 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,5 +1,13 @@
 # Sanitize History
 
+## 4.6.4 (2018-03-20)
+
+* Fixed: A change introduced in 4.6.2 broke certain transformers that relied on
+  being able to mutate the name of an HTML node. That change has been reverted
+  and a test has been added to cover this case. [@zetter - #177][177]
+
+[177]:https://github.com/rgrove/sanitize/issues/177
+
 ## 4.6.3 (2018-03-19)
 
 * [CVE-2018-3740][176]: Fixed an HTML injection vulnerability that could allow
diff --git a/lib/sanitize/version.rb b/lib/sanitize/version.rb
index 6d59835..5deb4b4 100644
--- a/lib/sanitize/version.rb
+++ b/lib/sanitize/version.rb
@@ -1,5 +1,5 @@
 # encoding: utf-8
 
 class Sanitize
-  VERSION = '4.6.3'
+  VERSION = '4.6.4'
 end