diff --git a/README.md b/README.md
index 7523c68..0af1712 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 ## What is Ground?
 
-Ground is an interpreter which processes and interprets Ground instructions. It is quite fast, and the syntax is simple.
+Ground is a sigma interpreter which processes and interprets Ground instructions. It is quite fast, and the syntax is simple.
 
 ## What are the main features of Ground?