diff --git a/buildSrc/src/main/kotlin/dependencies/Dep.kt b/buildSrc/src/main/kotlin/dependencies/Dep.kt
index ea00e19..413c6b7 100644
--- a/buildSrc/src/main/kotlin/dependencies/Dep.kt
+++ b/buildSrc/src/main/kotlin/dependencies/Dep.kt
@@ -2,7 +2,7 @@ package dependencies
 
 object Dep {
 
-    private const val kotlin = "1.5.0"
+    private const val kotlin = "1.5.21"
 
     object GradlePlugin {
         const val kotlin = "org.jetbrains.kotlin:kotlin-gradle-plugin:${Dep.kotlin}"
@@ -20,7 +20,7 @@ object Dep {
     }
 
     object Coroutines {
-        private const val version = "1.5.0-RC"
+        private const val version = "1.5.1-native-mt"
 
         const val core = "org.jetbrains.kotlinx:kotlinx-coroutines-core:$version"
     }
diff --git a/js/build.gradle.kts b/js/build.gradle.kts
index 321b471..84559b4 100644
--- a/js/build.gradle.kts
+++ b/js/build.gradle.kts
@@ -14,15 +14,15 @@ dependencies {
 }
 
 kotlin {
-    target {
+    js {
         browser {
             // execute :js:browserRun to launch dev server
             runTask {
                 devServer = KotlinWebpackConfig.DevServer(
-                    true, false, true, true, false,
-                    8080,
-                    null,
-                    listOf("${projectDir}/src/main/resources".toString())
+                    open = true,
+                    port = 8080,
+                    proxy = null,
+                    contentBase = mutableListOf("${projectDir}/src/main/resources")
                 )
                 outputFileName = "main.js"
             }
diff --git a/napier/src/commonTest/kotlin/io/github/aakira/napier/NapierTest.kt b/napier/src/commonTest/kotlin/io/github/aakira/napier/NapierTest.kt
index 33f8b80..118a7e3 100644
--- a/napier/src/commonTest/kotlin/io/github/aakira/napier/NapierTest.kt
+++ b/napier/src/commonTest/kotlin/io/github/aakira/napier/NapierTest.kt
@@ -1,6 +1,6 @@
 package io.github.aakira.napier
 
-import com.github.aakira.napier.atomic.AtomicMutableList
+import io.github.aakira.napier.atomic.AtomicMutableList
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
@@ -25,7 +25,12 @@ class NapierTest {
     fun `Check output log`() {
         val output = AtomicMutableList<Expected>()
         Napier.base(object : Antilog() {
-            override fun performLog(priority: Napier.Level, tag: String?, throwable: Throwable?, message: String?) {
+            override fun performLog(
+                priority: Napier.Level,
+                tag: String?,
+                throwable: Throwable?,
+                message: String?
+            ) {
                 output.add(Expected(priority, tag, throwable, message))
             }
         })
diff --git a/napier/src/iosTest/kotlin/io/github/aakira/napier/NapierIosTest.kt b/napier/src/iosTest/kotlin/io/github/aakira/napier/NapierIosTest.kt
index c96f53a..7550c8f 100644
--- a/napier/src/iosTest/kotlin/io/github/aakira/napier/NapierIosTest.kt
+++ b/napier/src/iosTest/kotlin/io/github/aakira/napier/NapierIosTest.kt
@@ -1,6 +1,5 @@
 package io.github.aakira.napier
 
-import io.github.aakira.napier.DebugAntilog
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
diff --git a/napier/src/jvmTest/kotlin/io/github/aakira/napier/NapierJvmTest.kt b/napier/src/jvmTest/kotlin/io/github/aakira/napier/NapierJvmTest.kt
index ef96cbc..729bda8 100644
--- a/napier/src/jvmTest/kotlin/io/github/aakira/napier/NapierJvmTest.kt
+++ b/napier/src/jvmTest/kotlin/io/github/aakira/napier/NapierJvmTest.kt
@@ -1,7 +1,5 @@
 package io.github.aakira.napier
 
-import io.github.aakira.napier.DebugAntilog
-import io.github.aakira.napier.Napier
 import org.junit.Test
 import kotlin.test.assertEquals
 import kotlin.test.assertNotEquals
@@ -13,8 +11,14 @@ class NapierJvmTest {
     @Test
     fun `Check createStackElementTag`() {
         assertEquals("Hoge", debugAntilog.createStackElementTag("io.github.aakira.napier.Hoge"))
-        assertEquals("Hoge2", debugAntilog.createStackElementTag("AA\$io.github.aakira.napier.Hoge2"))
-        assertNotEquals("default", debugAntilog.createStackElementTag("io.github.aakira.napier.Hoge3\$default"))
+        assertEquals(
+            "Hoge2",
+            debugAntilog.createStackElementTag("AA\$io.github.aakira.napier.Hoge2")
+        )
+        assertNotEquals(
+            "default",
+            debugAntilog.createStackElementTag("io.github.aakira.napier.Hoge3\$default")
+        )
     }
 
     @Test