diff --git a/mpmaster/build.gradle b/mpmaster/build.gradle
index fe7a8031..9f31840d 100644
--- a/mpmaster/build.gradle
+++ b/mpmaster/build.gradle
@@ -4,7 +4,7 @@ plugins {
 
 def AppMajorVersion = 1
 def AppMinorVersion = 0
-def AppBuildNumber = 21
+def AppBuildNumber = 22
 
 def AppVersionName = AppMajorVersion + "." + AppMinorVersion + "." + AppBuildNumber
 def AppVersionCode = AppMajorVersion * 100000 + AppMinorVersion * 1000 + AppBuildNumber
@@ -28,6 +28,15 @@ android {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+
+            android.applicationVariants.all { variant ->
+                variant.outputs.all { output ->
+                    if (outputFileName.endsWith('.apk')) {
+                        def fileName = "MpMaster_v${defaultConfig.versionName}_rel_${new Date(System.currentTimeMillis()).format("yyyyMMdd")}.apk"
+                        outputFileName = fileName
+                    }
+                }
+            }
         }
         debug {
             jniDebuggable true