diff --git a/content/members/myungho-lee/index.md b/content/members/myungho-lee/index.md
index e6fd7b9..2f25f15 100644
--- a/content/members/myungho-lee/index.md
+++ b/content/members/myungho-lee/index.md
@@ -3,7 +3,7 @@ draft = false
 title = 'Myungho Lee'
 ko = '이명호'
 role = 'Ph.D. Student'
-portrait = 'portrait.jpg'
+portrait = 'portrait.png'
 
 [[affiliation]]
 name = 'Software Analysis Lab'
diff --git a/content/members/myungho-lee/portrait.jpg b/content/members/myungho-lee/portrait.jpg
deleted file mode 100644
index 3b0f828..0000000
Binary files a/content/members/myungho-lee/portrait.jpg and /dev/null differ
diff --git a/content/members/myungho-lee/portrait.png b/content/members/myungho-lee/portrait.png
new file mode 100644
index 0000000..3daf8bd
Binary files /dev/null and b/content/members/myungho-lee/portrait.png differ