diff --git a/content/authors/dongjun/index.md b/content/authors/dongjun/index.md
index 416f221..73064ae 100644
--- a/content/authors/dongjun/index.md
+++ b/content/authors/dongjun/index.md
@@ -12,7 +12,7 @@ highlight_name: true
 # Organizational groups that you belong to (for People widget)
 #   Set this to `[]` or comment out if you are not using People widget.
 user_groups:
-- Master Students
+- Ph.D. Students
 
 external_link: https://pwnable.co.kr
 ---