diff --git a/bottom-navigation-fragment/build.gradle b/bottom-navigation-fragment/build.gradle
index f24dfbf..87c56a9 100644
--- a/bottom-navigation-fragment/build.gradle
+++ b/bottom-navigation-fragment/build.gradle
@@ -12,6 +12,11 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8.toString()
+    }
+
 }
 
 dependencies {
diff --git a/bottom-navigation-viewcontroller/build.gradle b/bottom-navigation-viewcontroller/build.gradle
index 0a4487e..cdae20e 100644
--- a/bottom-navigation-viewcontroller/build.gradle
+++ b/bottom-navigation-viewcontroller/build.gradle
@@ -12,6 +12,11 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8.toString()
+    }
+
 }
 
 dependencies {
diff --git a/navigation-base/build.gradle b/navigation-base/build.gradle
index 5aa8b2b..af04146 100644
--- a/navigation-base/build.gradle
+++ b/navigation-base/build.gradle
@@ -13,6 +13,11 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8.toString()
+    }
+
 }
 
 dependencies {
diff --git a/navigation-viewcontroller/build.gradle b/navigation-viewcontroller/build.gradle
index dd1ac36..20888aa 100644
--- a/navigation-viewcontroller/build.gradle
+++ b/navigation-viewcontroller/build.gradle
@@ -13,6 +13,11 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
     }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8.toString()
+    }
+
 }
 
 dependencies {