diff --git a/HISTORY.md b/HISTORY.md
index 5cacbb2..3bc9814 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,7 +1,7 @@
 History
 =======
 
-## Unreleased
+## 3.1.0
 
 * Add `--env` environment variable flag.
   [#45](https://github.com/FormidableLabs/builder/issues/45)
diff --git a/package.json b/package.json
index a50dbae..c9bce8e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "builder",
-  "version": "3.0.0",
+  "version": "3.1.0",
   "description": "An NPM-based task runner",
   "repository": {
     "type": "git",