diff --git a/.age.toml b/.age.toml
index 556181c..89da917 100644
--- a/.age.toml
+++ b/.age.toml
@@ -1,4 +1,4 @@
-current_version = "0.5.0"
+current_version = "0.5.1"
 
 [[files]]
 path = "package.json"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6267740..5a0b984 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # 更新履歴
 
+## v0.5.1 - 2024-11-28 (JST)
+
+* プレビュー時のコードブロック内で、タグのデザインが大きく崩れていた点を解消。
+
 ## v0.5.0 - 2024-11-25 (JST)
 
 * コンテンツ取得等をPATからGitHub Appsへ変更。
diff --git a/package.json b/package.json
index 6976f66..07061a1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "zenn-preview",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "scripts": {
     "postinstall": "lefthook install",
     "test": "vitest",