diff --git a/CHANGELOG.md b/CHANGELOG.md
index 37f9beb..e10513a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-### 0.5 - 2023-01-??
+### 0.5.0 - 2023-01-04
 - Add support for defining customer Formatters.
 - Add ObjectInspector::Configuration#formatter_class setting for overriding the default Formatter. See the README for more.
 - Add a benchmarking script for comparing performance of formatters. See the README for more.
diff --git a/Gemfile.lock b/Gemfile.lock
index 3e09ce5..aab567f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    object_identifier (0.4.1)
+    object_identifier (0.5.0)
 
 GEM
   remote: https://rubygems.org/
diff --git a/lib/object_identifier/version.rb b/lib/object_identifier/version.rb
index f0a1c5f..cf29492 100644
--- a/lib/object_identifier/version.rb
+++ b/lib/object_identifier/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module ObjectIdentifier
-  VERSION = "0.4.1"
+  VERSION = "0.5.0"
 end