diff --git a/glossary/TypeScript.md b/glossary/TypeScript.md
index 40951afff..2cd514aa3 100644
--- a/glossary/TypeScript.md
+++ b/glossary/TypeScript.md
@@ -1,4 +1,4 @@
 ### TypeScript
 
-TypeScript is a superset of JavaScript, adding static typing to the language.
+TypeScript is a superset of JavaScript, adding optional static typing to the language.
 TypeScript compiles to plain JavaScript.