diff --git a/docs/expressions/index.md b/docs/expressions/index.md
index c20246623..61674fd3c 100644
--- a/docs/expressions/index.md
+++ b/docs/expressions/index.md
@@ -5,7 +5,7 @@ The parser supports all data types, functions and constants available in math.js
 
 Whilst the math.js library is aimed at JavaScript developers, the expression
 parser is aimed at end users: mathematicians, engineers, students, pupils.
-The syntax of the expression parser differs from JavaScript and the low level
+The syntax of the expression parser differs from JavaScript and the low-level
 math.js library.
 
 This section is divided in the following pages: