diff --git a/HISTORY.md b/HISTORY.md
index bb064be..07d2a5f 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,5 +1,14 @@
 # Sanitize History
 
+## 5.2.3 (2021-01-11)
+
+### Bug Fixes
+
+* Ensure protocol sanitization is applied to data attributes.
+  [@ccutrer - #207][207]
+
+[207]:https://github.com/rgrove/sanitize/pull/207
+
 ## 5.2.2 (2021-01-06)
 
 ### Bug Fixes
diff --git a/lib/sanitize/version.rb b/lib/sanitize/version.rb
index 7be4bf7..84e8452 100644
--- a/lib/sanitize/version.rb
+++ b/lib/sanitize/version.rb
@@ -1,5 +1,5 @@
 # encoding: utf-8
 
 class Sanitize
-  VERSION = '5.2.2'
+  VERSION = '5.2.3'
 end