diff --git a/CHANGELOG.md b/CHANGELOG.md
index ca6aab0..0a010fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## next / unreleased
+## 2.21.0.rc1 / 2023-04-02
 
 ### HTML5 Support
 
diff --git a/lib/loofah/version.rb b/lib/loofah/version.rb
index 4e25947..115aec4 100644
--- a/lib/loofah/version.rb
+++ b/lib/loofah/version.rb
@@ -2,5 +2,5 @@
 
 module Loofah
   # The version of Loofah you are using
-  VERSION = "2.21.0.dev"
+  VERSION = "2.21.0.rc1"
 end