diff --git a/src/capitalize/capitalize.ts b/src/capitalize/capitalize.ts
index d355048..2d57823 100644
--- a/src/capitalize/capitalize.ts
+++ b/src/capitalize/capitalize.ts
@@ -1,3 +1,8 @@
 export function capitalize(word: string) {
+
+    if (!word) {
+        return '';
+    }
+
     return word.charAt(0).toUpperCase() + word.slice(1);
 }
\ No newline at end of file