diff --git a/CHANGELOG.md b/CHANGELOG.md
index 07ddd738f..951053721 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## 3.1.0 (unreleased)
+## 3.1.0 (2020-06-23)
 
 ### New features
  * `SafeCast`: added functions to downcast signed integers (e.g. `toInt32`), improving usability of `SignedSafeMath`. ([#2243](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2243))
diff --git a/contracts/package.json b/contracts/package.json
index 841cbe311..0592d6a2d 100644
--- a/contracts/package.json
+++ b/contracts/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@openzeppelin/contracts",
-  "version": "3.0.2",
+  "version": "3.1.0",
   "description": "Secure Smart Contract library for Solidity",
   "files": [
     "**/*.sol",
diff --git a/package-lock.json b/package-lock.json
index 2773b61ac..7f8a7a4ff 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "openzeppelin-solidity",
-  "version": "3.0.2",
+  "version": "3.1.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 362e0c00d..58dcd9cf7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "openzeppelin-solidity",
-  "version": "3.0.2",
+  "version": "3.1.0",
   "description": "Secure Smart Contract library for Solidity",
   "files": [
     "/contracts/**/*.sol",