diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d86158..cea508b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## main (unreleased)
 
+## 2.2.0 (2024-02-05)
+
+* Restore Rails 6.1 compatibility.
 * Accept anything that responds to `===` in `Configuration.warnings_treated_as_deprecation`.
 
 ## 2.1.0 (2024-01-19)
diff --git a/Gemfile.lock b/Gemfile.lock
index 352637d..1bd5fbf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    deprecation_toolkit (2.1.0)
+    deprecation_toolkit (2.2.0)
       activesupport (>= 6.1)
 
 GEM
diff --git a/lib/deprecation_toolkit/version.rb b/lib/deprecation_toolkit/version.rb
index ef034f0..c17c759 100644
--- a/lib/deprecation_toolkit/version.rb
+++ b/lib/deprecation_toolkit/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module DeprecationToolkit
-  VERSION = "2.1.0"
+  VERSION = "2.2.0"
 end