diff --git a/people/MizuharaNagisa/page.en.md b/people/MizuharaNagisa/page.en.md
index 3d46be9b..8976ceb0 100644
--- a/people/MizuharaNagisa/page.en.md
+++ b/people/MizuharaNagisa/page.en.md
@@ -69,7 +69,7 @@ This is the [last piece of writing](https://pbs.twimg.com/media/E6odBBBVIAAM-Zt?
 > — Mizuhara Nagisa, 2021 June 20th.
 
 <PhotoScroll photos={[
-    '${path}/photos/letter.jpg',
+    '${path}/photos/letter.webp',
 ]} />
 
 We wish you to be able to meet the girls in Jinjufu and live happily in another world,
diff --git a/people/MizuharaNagisa/page.md b/people/MizuharaNagisa/page.md
index c02c0fc2..75eefdc1 100644
--- a/people/MizuharaNagisa/page.md
+++ b/people/MizuharaNagisa/page.md
@@ -14,7 +14,7 @@ info:
 这是水原留给我们的，[最后的文字](https://pbs.twimg.com/media/E6odBBBVIAAM-Zt?format=jpg&name=4096x4096)。
 
 <PhotoScroll photos={[
-    '${path}/photos/letter.jpg',
+    '${path}/photos/letter.webp',
 ]} />
 
 希望你在永远放下这个世界的苦难之后，可以在另一个世界与镇守府的姑娘们相遇，和她们一起快乐地生活下去。
diff --git a/people/MizuharaNagisa/page.zh_hant.md b/people/MizuharaNagisa/page.zh_hant.md
index 3afae18e..cf45cf75 100644
--- a/people/MizuharaNagisa/page.zh_hant.md
+++ b/people/MizuharaNagisa/page.zh_hant.md
@@ -14,7 +14,7 @@ info:
 這是水原留給我們的，[最後的文字](https://pbs.twimg.com/media/E6odBBBVIAAM-Zt?format=jpg&name=4096x4096)。
 
 <PhotoScroll photos={[
-    '${path}/photos/letter.jpg',
+    '${path}/photos/letter.webp',
 ]} />
 
 希望你在永遠放下這個世界的苦難之後，可以在另一個世界與鎮守府的姑娘們相遇，和她們一起快樂地生活下去。
diff --git a/people/MizuharaNagisa/photos/letter.jpg b/people/MizuharaNagisa/photos/letter.jpg
deleted file mode 100644
index 070bc7b8..00000000
Binary files a/people/MizuharaNagisa/photos/letter.jpg and /dev/null differ
diff --git a/people/MizuharaNagisa/photos/letter.webp b/people/MizuharaNagisa/photos/letter.webp
new file mode 100644
index 00000000..49b6f1c5
Binary files /dev/null and b/people/MizuharaNagisa/photos/letter.webp differ