diff --git a/.travis.yml b/.travis.yml
index 8433ddf..4b57ecb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,14 +6,11 @@ android:
     - tools
     - platform-tools
     - build-tools-28.0.3
-    - android-28
+    - android-29
     - extra-android-m2repository
 
-  licenses:
-    - android-sdk-license-.+
-
 before_script:
-    - yes | sdkmanager "platforms;android-28"
+    - yes | sdkmanager "platforms;android-29"
 
 script:
     - ./gradlew clean build
diff --git a/README.md b/README.md
index 3ced2df..67a7c02 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'com.github.mrmike:ok2curl:0.5.0'
+    implementation 'com.github.mrmike:ok2curl:0.6.0'
 }
 ```
 
diff --git a/build.gradle b/build.gradle
index 24e22b3..08f8c59 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.1'
+        classpath 'com.android.tools.build:gradle:3.6.3'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
     }
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 29953ea..87b738c 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index b7768ce..4c5803d 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,5 @@
-#Wed Feb 27 20:07:24 CET 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-all.zip
diff --git a/gradlew b/gradlew
index cccdd3d..af6708f 100755
--- a/gradlew
+++ b/gradlew
@@ -28,7 +28,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS=""
+DEFAULT_JVM_OPTS='"-Xmx64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
diff --git a/gradlew.bat b/gradlew.bat
index e95643d..0f8d593 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -14,7 +14,7 @@ set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS=
+set DEFAULT_JVM_OPTS="-Xmx64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
diff --git a/ok2curl/build.gradle b/ok2curl/build.gradle
index 5b20178..ac254fc 100644
--- a/ok2curl/build.gradle
+++ b/ok2curl/build.gradle
@@ -4,26 +4,26 @@ apply plugin: 'maven-publish'
 apply plugin: 'com.jfrog.bintray'
 
 group='com.github.mrmike'
-version='0.5.0'
+version='0.6.0'
 
 targetCompatibility = '1.8'
 sourceCompatibility = '1.8'
 
 dependencies {
-    compile 'com.squareup.okhttp3:okhttp:3.13.1'
+    implementation 'com.squareup.okhttp3:okhttp:4.6.0'
 
-    testCompile 'junit:junit:4.12'
-    testCompile 'org.mockito:mockito-core:2.23.0'
-    testCompile 'com.squareup.okhttp3:mockwebserver:3.13.1'
+    testImplementation 'junit:junit:4.12'
+    testImplementation 'org.mockito:mockito-core:2.23.0'
+    testImplementation 'com.squareup.okhttp3:mockwebserver:4.2.0'
 }
 
 task sourcesJar(type: Jar, dependsOn: classes) {
-    classifier = 'sources'
+    archiveClassifier = 'sources'
     from sourceSets.main.allSource
 }
 
 task javadocJar(type: Jar, dependsOn: javadoc) {
-    classifier = 'javadoc'
+    archiveClassifier = 'javadoc'
     from javadoc.destinationDir
 }
 
diff --git a/sample/build.gradle b/sample/build.gradle
index 4c7f218..6084ebc 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -1,11 +1,11 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 29
     defaultConfig {
         applicationId "com.moczul.sample"
         minSdkVersion 14
-        targetSdkVersion 28
+        targetSdkVersion 29
         versionCode 1
         versionName "1.0"
     }
@@ -32,19 +32,20 @@ dependencies {
     implementation project(':ok2curl')
 
     /**
-     * implementation 'com.github.mrmike:ok2curl:0.5.0'
+     * implementation 'com.github.mrmike:ok2curl:0.6.0'
      */
 
     /**
      * Ok2Curl is packed with the latest version of OkHttp. If you already have OkHttp declared in
      * your dependencies or want to use different version simply add exclude module.
      *
-     * implementation ('com.github.mrmike:ok2curl:0.5.0') {
+     * implementation ('com.github.mrmike:ok2curl:0.6.0') {
      *      exclude module: 'okhttp'
      * }
      */
 
-    implementation 'androidx.appcompat:appcompat:1.0.2'
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'com.squareup.okhttp3:okhttp:4.6.0'
 
     testImplementation 'junit:junit:4.12'
     testImplementation 'org.mockito:mockito-core:2.23.0'