diff --git a/app/build.gradle b/app/build.gradle
index 6501848..4dd483d 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -10,7 +10,7 @@ android {
     buildToolsVersion "26.0.1"
     packagingOptions.excludes = ['META-INF/services/javax.annotation.processing.Processor',
                                  'META-INF/LICENSE.txt', 'META-INF/NOTICE.txt', 'META-INF/README.txt',
-                                 'META-INF/MANIFEST.MF','LICENSE.txt', 'NOTICE.txt', 'README.txt', '.readme']
+                                 'META-INF/MANIFEST.MF', 'LICENSE.txt', 'NOTICE.txt', 'README.txt', '.readme']
 
     def props = new Properties()
     props.load(file("secrets.properties").newInputStream())
diff --git a/build.gradle b/build.gradle
index 00bd719..c359279 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,8 +2,8 @@
 
 buildscript {
     ext {
-        appVersionName = "1.6.3"
-        appVersionCode = 45
+        appVersionName = "1.6.4"
+        appVersionCode = 46
         prepareToRelease = false
 
         kotlin_version = "1.1.3-2"
@@ -23,7 +23,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.0-alpha8'
+        classpath 'com.android.tools.build:gradle:2.3.3'
         classpath 'com.google.gms:google-services:3.1.0'
         classpath ('com.google.firebase:firebase-plugins:1.1.0') {
             exclude group: 'com.google.guava', module: 'guava-jdk5'