diff --git a/app/build.gradle b/app/build.gradle
index 77087cb..5dce822 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,7 +23,7 @@ android {
 }
 
 dependencies {
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation "com.android.support:appcompat-v7:$support_version"
-    implementation project (":revealpassword")
+    implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.2.50'
+    implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'
+    implementation project(":revealpassword")
 }
diff --git a/build.gradle b/build.gradle
index 072f7b6..856c6d2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,4 @@
 buildscript {
-    ext.kotlin_version = '1.2.50'
-    ext.support_version = '28.0.0-alpha3'
 
     repositories {
         google()
@@ -9,8 +7,9 @@ buildscript {
 
     dependencies {
         classpath 'com.android.tools.build:gradle:3.1.3'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.50"
         classpath 'com.github.dcendents:android-maven-gradle-plugin:2.0'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+
     }
 }
 
diff --git a/revealpassword/build.gradle b/revealpassword/build.gradle
index d2840e6..ee30002 100644
--- a/revealpassword/build.gradle
+++ b/revealpassword/build.gradle
@@ -24,8 +24,8 @@ android {
 }
 
 dependencies {
-    compileOnly "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    compileOnly "com.android.support:appcompat-v7:$support_version"
+    compileOnly 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.2.50'
+    compileOnly 'com.android.support:appcompat-v7:28.0.0-alpha3'
 }
 repositories {
     mavenCentral()