diff --git a/.jazzy.yaml b/.jazzy.yaml
index 42875c4..e9aa57f 100644
--- a/.jazzy.yaml
+++ b/.jazzy.yaml
@@ -1,7 +1,7 @@
 module: MotionAnimator
-module_version: 2.3.0
+module_version: 2.4.0
 sdk: iphonesimulator
 umbrella_header: src/MotionAnimator.h
 objc: true
 github_url: https://github.com/material-motion/motion-animator-objc
-github_file_prefix: https://github.com/material-motion/motion-animator-objc/tree/v2.3.0
+github_file_prefix: https://github.com/material-motion/motion-animator-objc/tree/v2.4.0
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b45f6e4..99bc1cc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,35 @@
+# 2.4.0
+
+This minor release introduces support for implicitly animating CALayers that have been created
+independently of a UIView. To use this new functionality, consider the following example:
+
+```swift
+let layer = CALayer()
+layer.delegate = MotionAnimator.sharedLayerDelegate()
+animator.animate(with: timing) {
+  layer.opacity = 0.5
+}
+```
+
+## New features
+
+Added support for adding implicit animations to headless CALayer instances.
+
+## Source changes
+
+* [Add support for headless implicit layer animations. (#45)](https://github.com/material-motion/motion-animator-objc/commit/b92bb0a26c3458b508e0ba85628aea3e1590df28) (featherless)
+
+## API changes
+
+### MDMAnimator
+
+**new** method: `+sharedLayerDelegate`
+
+## Non-source changes
+
+* [Remove references to interchange macros. (#44)](https://github.com/material-motion/motion-animator-objc/commit/a1c771b781713d6fc63e68ede73690e1f16c9624) (featherless)
+* [Add missing Info.plist. (#43)](https://github.com/material-motion/motion-animator-objc/commit/41fa66f904b28058f5a968da879749d3732d6c35) (Sylvain Defresne)
+
 # 2.3.0
 
 This minor release introduces new features for working with gestural interactions.
diff --git a/MotionAnimator.podspec b/MotionAnimator.podspec
index 7db7ce2..79cdd5f 100644
--- a/MotionAnimator.podspec
+++ b/MotionAnimator.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
   s.name         = "MotionAnimator"
   s.summary      = "A Motion Animator creates performant, interruptible animations from motion specs."
-  s.version      = "2.3.0"
+  s.version      = "2.4.0"
   s.authors      = "The Material Motion Authors"
   s.license      = "Apache 2.0"
   s.homepage     = "https://github.com/material-motion/motion-animator-objc"
diff --git a/Podfile.lock b/Podfile.lock
index de8b3bf..2ea7bdc 100644
--- a/Podfile.lock
+++ b/Podfile.lock
@@ -1,6 +1,6 @@
 PODS:
   - CatalogByConvention (2.2.0)
-  - MotionAnimator (2.3.0):
+  - MotionAnimator (2.4.0):
     - MotionInterchange (~> 1.3)
   - MotionInterchange (1.3.0)
 
@@ -14,7 +14,7 @@ EXTERNAL SOURCES:
 
 SPEC CHECKSUMS:
   CatalogByConvention: 5df5831e48b8083b18570dcb804f20fd1c90694f
-  MotionAnimator: 133a697ee8c7e07f96553f641571bdb6ef698cb2
+  MotionAnimator: 640dc3e652080bd05251e5ffe32b41f16bfaa3e1
   MotionInterchange: 988fc0011e4b806cc33f2fb4f9566f5eeb4159e8
 
 PODFILE CHECKSUM: 3537bf01c11174928ac008c20fec4738722e96f3