diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 0abc9e252..d9ae0ad0c 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Sep 25 12:48:54 IST 2018
+#Fri Mar 15 15:13:53 ICT 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip
diff --git a/sample/build.gradle b/sample/build.gradle
index a89dc4bc6..922aee1ab 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -53,8 +53,8 @@ dependencies {
     implementation "androidx.appcompat:appcompat:$versions.appcompat"
     implementation "androidx.constraintlayout:constraintlayout:$versions.constraintLayout"
     testImplementation 'junit:junit:4.12'
-    androidTestImplementation "androidx.test.ext:junit:1.0.0"
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
+    androidTestImplementation "androidx.test.ext:junit:1.1.0"
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
 
     implementation project(':folioreader')
     //implementation "com.folioreader:folioreader:$versions.folioreaderSdk"
diff --git a/versions.gradle b/versions.gradle
index 8c420eed1..aeb880cf9 100644
--- a/versions.gradle
+++ b/versions.gradle
@@ -11,8 +11,8 @@ versions.androidMinSdk = 21
 versions.androidCompileSdk = 28
 versions.androidTargetSdk = 28
 
-versions.androidGradlePlugin = "3.2.1"
-versions.kotlin = "1.3.11"
+versions.androidGradlePlugin = '3.3.2'
+versions.kotlin = "1.3.21"
 
 versions.appcompat = "1.0.2"
 versions.constraintLayout = "1.1.3"