diff --git a/app/build.gradle b/app/build.gradle
index 51e9c51..db9f357 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -4,7 +4,7 @@ apply plugin: 'kotlin-android-extensions'
 
 android {
     compileSdkVersion 25
-    buildToolsVersion "25.0.1"
+    buildToolsVersion "25.0.3"
 
     defaultConfig {
         applicationId "com.simplemobiletools.thankyou"
@@ -38,7 +38,7 @@ dependencies {
 }
 
 buildscript {
-    ext.kotlin_version = '1.0.3'
+    ext.kotlin_version = '1.1.51'
     repositories {
         mavenCentral()
     }
@@ -54,12 +54,11 @@ def propFile = new File('signing.properties')
 if (propFile.canRead()) {
     props.load(new FileInputStream(propFile))
 
-    if (props != null && props.containsKey('STORE_FILE') && props.containsKey('STORE_PASSWORD') &&
-            props.containsKey('KEY_ALIAS') && props.containsKey('KEY_PASSWORD')) {
+    if (props != null && props.containsKey('STORE_FILE') && props.containsKey('KEY_ALIAS') && props.containsKey('PASSWORD')) {
         android.signingConfigs.release.storeFile = file(props['STORE_FILE'])
-        android.signingConfigs.release.storePassword = props['STORE_PASSWORD']
+        android.signingConfigs.release.storePassword = props['PASSWORD']
         android.signingConfigs.release.keyAlias = props['KEY_ALIAS']
-        android.signingConfigs.release.keyPassword = props['KEY_PASSWORD']
+        android.signingConfigs.release.keyPassword = props['PASSWORD']
     } else {
         println 'signing.properties found but some entries are missing'
         android.buildTypes.release.signingConfig = null
diff --git a/build.gradle b/build.gradle
index 74b2ab0..c2eea8e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.3'
+        classpath 'com.android.tools.build:gradle:2.3.3'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 04e285f..b214470 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Mon Dec 28 10:00:20 PST 2015
+#Thu Oct 26 17:27:58 CEST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
diff --git a/signing.properties_sample b/signing.properties_sample
index acf8fb9..cf8e239 100644
--- a/signing.properties_sample
+++ b/signing.properties_sample
@@ -1,4 +1,3 @@
 STORE_FILE=/path/to/your.keystore
-STORE_PASSWORD=yourkeypass
 KEY_ALIAS=projectkeyalias
-KEY_PASSWORD=yourkeypass
+PASSWORD=yourpass