diff --git a/pages/release notes/TypeScript 3.7.md b/pages/release notes/TypeScript 3.7.md
index 3574efc33..e51303e1b 100644
--- a/pages/release notes/TypeScript 3.7.md	
+++ b/pages/release notes/TypeScript 3.7.md	
@@ -288,7 +288,7 @@ function isString(val: any): val is string {
 
 function yell(str: any) {
     if (isString(str)) {
-        return str.toUppercase();
+        return str.toUpperCase();
     }
     throw "Oops!";
 }