diff --git a/CHANGELOG.md b/CHANGELOG.md
index 69d7685..9a8475c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,12 @@
 Changelog
 =========
 
+## 2.1.1 (2018-01-08)
+
+### Bug fixes
+
+* The runtime dependency "backo" was in `devDependencies` in package.json. It has been moved to `dependencies` (fixes #125).
+
 ## 2.1.0 (2018-01-08)
 
 ### Enhancements
diff --git a/lib/notifier.js b/lib/notifier.js
index 945d857..467d244 100644
--- a/lib/notifier.js
+++ b/lib/notifier.js
@@ -1,5 +1,5 @@
 module.exports = {
   name: "Bugsnag Node Notifier",
-  version: "2.1.0",
+  version: "2.1.1",
   url: "https://github.com/bugsnag/bugsnag-node"
 }
diff --git a/package.json b/package.json
index dc166c8..f0b449b 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "bugsnag",
   "description": "Bugsnag notifier for node.js scripts",
-  "version": "2.1.0",
+  "version": "2.1.1",
   "main": "./lib/bugsnag.js",
   "typings": "./lib/bugsnag.d.ts",
   "homepage": "http://bugsnag.com",