2.4.0

CHANGELOG.md

 # Changelog
 
-## 2.4.0 (unreleased)
+## 2.4.0 (2019-10-29)
 
 ### New features:
  * `Address.toPayable`: added a helper to convert between address types without having to resort to low-level casting. ([#1773](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1773))

contracts/package.json

 {
   "name": "@openzeppelin/contracts",
-  "version": "2.4.0-beta.2",
+  "version": "2.4.0",
   "description": "Secure Smart Contract library for Solidity",
   "files": [
     "**/*.sol",

ethpm.json

 {
   "package_name": "zeppelin",
-  "version": "2.4.0-beta.2",
+  "version": "2.4.0",
   "description": "Secure Smart Contract library for Solidity",
   "authors": [
     "OpenZeppelin Community <maintainers@openzeppelin.org>"

package-lock.json

 {
   "name": "openzeppelin-solidity",
-  "version": "2.4.0-beta.2",
+  "version": "2.4.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

package.json

 {
   "name": "openzeppelin-solidity",
-  "version": "2.4.0-beta.2",
+  "version": "2.4.0",
   "description": "Secure Smart Contract library for Solidity",
   "files": [
     "/contracts/**/*.sol",