diff --git a/CHANGELOG.md b/CHANGELOG.md
index 88c1350..bae1627 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,8 +2,8 @@
 
 ## 1.0.0 (2019-06-11)
 
-- Cloned original repository from [`github:ericclemmons/per-env`](https://github.com/ericclemmons/per-env).
-- Added support for Windows with [`cross-spawn`](https://www.npmjs.com/package/cross-spawn).
+- Cloned original repository from [**github:ericclemmons/per-env**](https://github.com/ericclemmons/per-env).
+- Added support for Windows with [**cross-spawn**](https://www.npmjs.com/package/cross-spawn).
 - Added support for Yarn by detecting `process.env.npm_execpath`.
 
 ## 1.0.1 (2019-06-12)
@@ -20,5 +20,10 @@
 
 ## 1.1.0 (2019-06-14)
 
-- Changed support of Yarn from `process.env.npm_execpath` to [`which-pm-runs`](https://www.npmjs.com/package/which-pm-runs), with additional pnpm support.
+- Changed support of Yarn from `process.env.npm_execpath` to [**which-pm-runs**](https://www.npmjs.com/package/which-pm-runs) which detects `process.env.npm_config_user_agent`, with additional pnpm support.
+- Updated README.
+
+## 1.1.1 (2019-06-17)
+
+- Supported fallback to `process.env.npm_execpath` if `process.env.npm_config_user_agent` by [**which-pm-runs**](https://www.npmjs.com/package/which-pm-runs) is `undefined`.
 - Updated README.
diff --git a/package.json b/package.json
index 805322c..954a47a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "by-node-env",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "Run package.json scripts by NODE_ENV.",
   "keywords": [
     "cross-per-env",