diff --git a/assets/img/author.jpg b/assets/img/author.jpg
deleted file mode 100644
index 1a5d28c..0000000
Binary files a/assets/img/author.jpg and /dev/null differ
diff --git a/assets/img/author.png b/assets/img/author.png
new file mode 100644
index 0000000..b81ca19
Binary files /dev/null and b/assets/img/author.png differ
diff --git a/config/_default/languages.en.toml b/config/_default/languages.en.toml
index 17962d1..9d707e3 100644
--- a/config/_default/languages.en.toml
+++ b/config/_default/languages.en.toml
@@ -8,7 +8,7 @@ copyright = "© 2024 Guanran928, licensed under [CC-BY-SA-4.0](https://creativec
 
 [params.author]
 name = "Guanran928"
-image = "img/author.jpg"
+image = "img/author.png"
 links = [
   # or "https://github.com/Guanran928.gpg"
   { gpg = "https://git.ny4.dev/nyancat.gpg" },
diff --git a/config/_default/languages.zh-cn.toml b/config/_default/languages.zh-cn.toml
index c9df97d..fe91fd4 100644
--- a/config/_default/languages.zh-cn.toml
+++ b/config/_default/languages.zh-cn.toml
@@ -8,7 +8,7 @@ copyright = "© 2024 Guanran928, 内容以 [CC-BY-SA-4.0](https://creativecommon
 
 [params.author]
 name = "Guanran928"
-image = "img/author.jpg"
+image = "img/author.png"
 links = [
   # or "https://github.com/Guanran928.gpg"
   { gpg = "https://git.ny4.dev/nyancat.gpg" },