diff --git a/README.md b/README.md
index 625bb7e..04f40a3 100644
--- a/README.md
+++ b/README.md
@@ -14,10 +14,13 @@ getpapers can fetch article metadata, fulltexts (PDF or XML), and supplementary
 
 ## Installation
 
+When logged in as root or using ```sudo```:
+
 ```bash
 $ npm install --global getpapers
 ```
 
+
 ## Usage
 
 Use `getpapers --help` to see the command-line help: