diff --git a/app/build.gradle b/app/build.gradle
index d49646aa2..b85e64eea 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -20,8 +20,8 @@ android {
         applicationId 'net.accelf.yuito'
         minSdkVersion 21
         targetSdkVersion 29
-        versionCode 38
-        versionName '4.0.0'
+        versionCode 39
+        versionName '4.0.1'
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
 
diff --git a/changelogs/v4.0.1/whatsnew-ja-JP b/changelogs/v4.0.1/whatsnew-ja-JP
new file mode 100644
index 000000000..f63d4b639
--- /dev/null
+++ b/changelogs/v4.0.1/whatsnew-ja-JP
@@ -0,0 +1 @@
+* アカウントのミュートに失敗する問題の修正