diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3e9548d..771d0c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,5 @@
+## [0.4.0] - 2024-01-22
+
 - Use Bucket#connditional_fillup inside Throttle and throttle only when the capacity _would_ be exceeded, as opposed
   to throttling when capacity has already been exceeded. This allows for finer-grained throttles such as
   "at most once in", where filling "exactly to capacity" is a requirement. It also provides for more accurate
diff --git a/lib/pecorino/version.rb b/lib/pecorino/version.rb
index 68a6c09..7742c8f 100644
--- a/lib/pecorino/version.rb
+++ b/lib/pecorino/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Pecorino
-  VERSION = "0.3.0"
+  VERSION = "0.4.0"
 end