diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0c2351a..9386a67 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # CHANGELOG
 
-## unreleased
+## 4.5.1
 
  * make sure to use override configuration options if state machine is defined more than once (see [issue #287](https://github.com/aasm/aasm/issues/287) for details)
 
diff --git a/lib/aasm/version.rb b/lib/aasm/version.rb
index 76bb33a..a9003e3 100644
--- a/lib/aasm/version.rb
+++ b/lib/aasm/version.rb
@@ -1,3 +1,3 @@
 module AASM
-  VERSION = "4.5.0"
+  VERSION = "4.5.1"
 end