diff --git a/bower.json b/bower.json
index 3f063a55..003c6459 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "aurelia-binding",
-  "version": "2.3.2",
+  "version": "2.4.0",
   "description": "A modern databinding library for JavaScript and HTML.",
   "license": "MIT",
   "keywords": [
diff --git a/dist/aurelia-binding.d.ts b/dist/aurelia-binding.d.ts
index 7e789777..4083deae 100644
--- a/dist/aurelia-binding.d.ts
+++ b/dist/aurelia-binding.d.ts
@@ -6,7 +6,7 @@ import { Container } from 'aurelia-dependency-injection';
  * object take precedence over members of the bindingContext object.
  */
 export declare interface OverrideContext {
-  parentOverrideContext: OverrideContext;
+  parentOverrideContext?: OverrideContext;
   bindingContext: any;
 }
 
diff --git a/doc/CHANGELOG.md b/doc/CHANGELOG.md
index 40662eef..f1690ae2 100644
--- a/doc/CHANGELOG.md
+++ b/doc/CHANGELOG.md
@@ -1,13 +1,13 @@
-<a name="2.3.2"></a>
-## [2.3.2](https://github.com/aurelia/binding/compare/2.2.0...2.3.2) (2019-05-02)
-
+<a name="2.4.0"></a>
+## [2.4.0](https://github.com/aurelia/binding/compare/2.3.1...2.4.0) (2019-08-06)
 
 ### Bug Fixes
 
 * **all:** change es2015 back to native-modules ([13dd661](https://github.com/aurelia/binding/commit/13dd661))
 * **build:** don't build declaration ([d359e83](https://github.com/aurelia/binding/commit/d359e83))
 * **connectable-binding:** remove the silent limit of 100 observers per expression ([56ba36d](https://github.com/aurelia/binding/commit/56ba36d)), closes [#742](https://github.com/aurelia/binding/issues/742)
-
+* **typing:** Make parentOverrideContext optional
+* **event-manager:** fix captured/delegated event decrement
 
 
 <a name="2.3.1"></a>
@@ -1147,4 +1147,4 @@
 
 * **AST:** do not coerce operands of || or && to booleans ([1c4260ce](http://github.com/aurelia/binding/commit/1c4260cebc3fe6f4b3e73ee237af3295afc042d2))
 * **ArrayObserveObserver:** unobserve array when there are no subscribers ([5e847640](http://github.com/aurelia/binding/commit/5e847640a3a3ca70648288c218e509a791c5493b))
-* **EventManager:** delegate and direct event subscription reversed ([11e36493](http://github.com/aur
\ No newline at end of file
+* **EventManager:** delegate and direct event subscription reversed ([11e36493](http://github.com/aur
diff --git a/package-lock.json b/package-lock.json
index f877259d..000903c5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "aurelia-binding",
-  "version": "2.3.0",
+  "version": "2.4.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 0cca7b95..71f20476 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "aurelia-binding",
-  "version": "2.3.2",
+  "version": "2.4.0",
   "description": "A modern databinding library for JavaScript and HTML.",
   "keywords": [
     "aurelia",