diff --git a/README.md b/README.md
index b50d650..745f5e3 100644
--- a/README.md
+++ b/README.md
@@ -11,3 +11,8 @@ npm install @cloudreach/docker-secrets
 const secrets = require('@cloudreach/docker-secrets');
 console.log(secrets);
 ```
+
+## Customization
+
+If the `SECRETS_DIR` environment variable is set, the specified location will be used in stead of `/run/secrets`.
+
diff --git a/index.js b/index.js
index 2d100ee..8b29c71 100644
--- a/index.js
+++ b/index.js
@@ -3,7 +3,7 @@
 const fs   = require('fs');
 const path = require('path');
 
-const SECRETS_DIR = '/run/secrets';
+const SECRETS_DIR = process.env.SECRETS_DIR || '/run/secrets';
 const output = {};
 
 if (fs.existsSync(SECRETS_DIR)) {