diff --git a/build.gradle b/build.gradle
index 9dd3365..6077e66 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,11 +1,11 @@
 buildscript {
-    ext.kotlin_version = '1.4.31'
+    ext.kotlin_version = '1.5.0'
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.2'
+        classpath 'com.android.tools.build:gradle:4.2.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index ee9c8ef..8150090 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-all.zip
diff --git a/sample/build.gradle b/sample/build.gradle
index 632f002..f3964cb 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -32,6 +32,6 @@ android {
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'androidx.fragment:fragment-ktx:1.3.0'
+    implementation 'androidx.fragment:fragment-ktx:1.3.3'
     implementation project(':ViewBinding-ktx')
 }
diff --git a/sample/src/main/java/com/wada811/viewbindingktx/ViewBindingFragment.kt b/sample/src/main/java/com/wada811/viewbindingktx/ViewBindingFragment.kt
index 052bea6..77e5012 100644
--- a/sample/src/main/java/com/wada811/viewbindingktx/ViewBindingFragment.kt
+++ b/sample/src/main/java/com/wada811/viewbindingktx/ViewBindingFragment.kt
@@ -11,7 +11,7 @@ class ViewBindingFragment : Fragment(R.layout.view_stub) {
     private val viewStubBinding: ViewStubBinding by viewBinding()
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        viewStubBinding.viewStub.setOnInflateListener { stub, inflated ->
+        viewStubBinding.viewStub.setOnInflateListener { _, inflated ->
             val binding = ViewBindingFragmentBinding.bind(inflated)
             binding.text.text = requireArguments().getString(EXTRA_TEXT)
         }