diff --git a/README.md b/README.md
index 3f204a2..98d9fed 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ These instructions are currently only tested on Debian Linux.
 1. Install development tools and libsodium development files:
 
 ```shell
-apt-get install build-essentials exim4-dev libsodium-dev
+apt-get install build-essential exim4-dev libsodium-dev
 ```
 
 2. Clone this repository: