diff --git a/app/build.gradle b/app/build.gradle
index 23b3d2df..b1fafe07 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -21,8 +21,8 @@ android {
         targetSdkVersion target_sdk_version
         minSdkVersion min_sdk_version
 
-        versionCode 420
-        versionName "4.2.0"
+        versionCode 421
+        versionName "4.2.1"
         applicationId "jp.juggler.subwaytooter"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"