diff --git a/Example/android/app/build.gradle b/Example/android/app/build.gradle
index fdba971..e47ede4 100644
--- a/Example/android/app/build.gradle
+++ b/Example/android/app/build.gradle
@@ -95,7 +95,7 @@ def enableProguardInReleaseBuilds = false
 
 android {
     compileSdkVersion 27
-    buildToolsVersion "27.0.3"
+    buildToolsVersion '28.0.3'
 
     defaultConfig {
         applicationId "com.example"
diff --git a/Example/android/build.gradle b/Example/android/build.gradle
index b40839f..77e1057 100644
--- a/Example/android/build.gradle
+++ b/Example/android/build.gradle
@@ -2,13 +2,13 @@
 
 buildscript {
     repositories {
-        jcenter()
+        google()
         maven { url "https://maven.google.com" }
         maven { url "https://jitpack.io" }
-        google()
+        jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.3'
+        classpath 'com.android.tools.build:gradle:3.2.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -18,12 +18,12 @@ buildscript {
 allprojects {
     repositories {
         mavenLocal()
-        jcenter()
         maven { url "https://maven.google.com" }
         maven { url "https://jitpack.io" }
         maven {
             // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
             url "$rootDir/../node_modules/react-native/android"
         }
+        jcenter()
     }
 }
diff --git a/Example/android/gradle/wrapper/gradle-wrapper.properties b/Example/android/gradle/wrapper/gradle-wrapper.properties
index 47ad315..a4c7258 100644
--- a/Example/android/gradle/wrapper/gradle-wrapper.properties
+++ b/Example/android/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Wed May 30 18:27:15 IST 2018
+#Thu Nov 01 11:05:42 IST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip
diff --git a/RNAppTour.js b/RNAppTour.js
index d92c052..245dec9 100644
--- a/RNAppTour.js
+++ b/RNAppTour.js
@@ -71,6 +71,13 @@ class AppTourView {
       throw new Error(
         'Provided tour view reference is undefined or null, please add a preliminary validation before adding for tour.'
       )
+
+    if (
+      view._reactInternalFiber === undefined ||
+      view._reactInternalFiber === null) {
+      throw new Error("Tour view does not have React Internal Fiber.");
+    }
+
     if (
       view._reactInternalFiber.key === undefined ||
       view._reactInternalFiber.key === null
diff --git a/android/build.gradle b/android/build.gradle
index a98fd36..bf4bf85 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -6,7 +6,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.2.1'
     }
 }
 
@@ -14,7 +14,7 @@ apply plugin: 'com.android.library'
 
 android {
     compileSdkVersion 27
-    buildToolsVersion "27.0.3"
+    buildToolsVersion '28.0.3'
 
     defaultConfig {
         minSdkVersion 16
diff --git a/package.json b/package.json
index c58b7c0..9160e43 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "react-native-app-tour",
-  "version": "0.0.16",
+  "version": "0.0.17",
   "description": "React Native: Native App Tour Library",
   "repository": {
     "type": "git",