diff --git a/build.gradle.kts b/build.gradle.kts
index dabf2ec..3ce7d28 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -2,7 +2,7 @@ plugins {
     id("maven")
     id("java")
     id("org.jetbrains.kotlin.jvm") version "1.3.72"
-    id("org.jlleitschuh.gradle.ktlint") version "9.2.1"
+    id("org.jlleitschuh.gradle.ktlint") version "9.3.0"
     id("jacoco")
 }
 
diff --git a/src/main/kotlin/com/mapk/core/Functions.kt b/src/main/kotlin/com/mapk/core/Functions.kt
index 7ef037e..556398c 100644
--- a/src/main/kotlin/com/mapk/core/Functions.kt
+++ b/src/main/kotlin/com/mapk/core/Functions.kt
@@ -8,7 +8,7 @@ import kotlin.reflect.full.functions
 
 inline fun <reified A : Annotation> KClass<*>.getAnnotatedFunctionsFromCompanionObject(): Pair<Any, List<KFunction<*>>>? {
     return this.companionObject?.let { companionObject ->
-        val temp = companionObject.functions.filter { functions -> functions.annotations.any { it is A } }
+        val temp = companionObject.functions.filter { function -> function.annotations.any { it is A } }
 
         if (temp.isEmpty()) {
             // 空ならその後の処理をしてもしょうがないのでnullに合わせる
diff --git a/src/main/kotlin/com/mapk/core/KFunctionForCall.kt b/src/main/kotlin/com/mapk/core/KFunctionForCall.kt
index 7586e05..4282305 100644
--- a/src/main/kotlin/com/mapk/core/KFunctionForCall.kt
+++ b/src/main/kotlin/com/mapk/core/KFunctionForCall.kt
@@ -7,12 +7,12 @@ import com.mapk.core.internal.ParameterNameConverter
 import com.mapk.core.internal.getAliasOrName
 import com.mapk.core.internal.getKConstructor
 import com.mapk.core.internal.isUseDefaultArgument
+import org.jetbrains.annotations.TestOnly
 import kotlin.reflect.KClass
 import kotlin.reflect.KFunction
 import kotlin.reflect.KParameter
 import kotlin.reflect.full.findAnnotation
 import kotlin.reflect.jvm.isAccessible
-import org.jetbrains.annotations.TestOnly
 
 class KFunctionForCall<T> internal constructor(
     @TestOnly
diff --git a/src/main/kotlin/com/mapk/core/internal/Functions.kt b/src/main/kotlin/com/mapk/core/internal/Functions.kt
index d8bbd8a..de3b7f6 100644
--- a/src/main/kotlin/com/mapk/core/internal/Functions.kt
+++ b/src/main/kotlin/com/mapk/core/internal/Functions.kt
@@ -22,13 +22,11 @@ internal fun KParameter.getAliasOrName(): String? = findAnnotation<KParameterAli
  * デフォルト引数を用いるかチェックする関数
  */
 internal fun KParameter.isUseDefaultArgument(): Boolean {
-    if (annotations.any { it is KUseDefaultArgument }) {
-        if (!isOptional) throw IllegalArgumentException(
+    return annotations.any { it is KUseDefaultArgument }.apply {
+        if (this && !isOptional) throw IllegalArgumentException(
             "Find ${KUseDefaultArgument::class.jvmName}, but it's not has default argument."
         )
-        return true
     }
-    return false
 }
 
 @Suppress("UNCHECKED_CAST")
diff --git a/src/test/kotlin/com/mapk/core/FunctionsTest.kt b/src/test/kotlin/com/mapk/core/FunctionsTest.kt
index 5164183..b8bce94 100644
--- a/src/test/kotlin/com/mapk/core/FunctionsTest.kt
+++ b/src/test/kotlin/com/mapk/core/FunctionsTest.kt
@@ -1,13 +1,13 @@
 package com.mapk.core
 
 import com.mapk.annotations.KConstructor
-import kotlin.reflect.full.companionObjectInstance
 import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Assertions.assertNull
 import org.junit.jupiter.api.Assertions.assertTrue
 import org.junit.jupiter.api.DisplayName
 import org.junit.jupiter.api.Nested
 import org.junit.jupiter.api.Test
+import kotlin.reflect.full.companionObjectInstance
 
 @DisplayName("共通利用関数関連のテスト")
 class FunctionsTest {
diff --git a/src/test/kotlin/com/mapk/core/KFunctionForCallTest.kt b/src/test/kotlin/com/mapk/core/KFunctionForCallTest.kt
index 930cdf1..605d5f5 100644
--- a/src/test/kotlin/com/mapk/core/KFunctionForCallTest.kt
+++ b/src/test/kotlin/com/mapk/core/KFunctionForCallTest.kt
@@ -2,8 +2,6 @@ package com.mapk.core
 
 import io.mockk.spyk
 import io.mockk.verify
-import kotlin.reflect.KParameter
-import kotlin.reflect.full.functions
 import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.DisplayName
 import org.junit.jupiter.api.Nested
@@ -11,6 +9,8 @@ import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.TestInstance
 import org.junit.jupiter.api.assertDoesNotThrow
 import org.junit.jupiter.api.assertThrows
+import kotlin.reflect.KParameter
+import kotlin.reflect.full.functions
 
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
 class KFunctionForCallTest {
diff --git a/src/test/kotlin/com/mapk/core/ToKConstructorTest.kt b/src/test/kotlin/com/mapk/core/ToKConstructorTest.kt
index ca26ab7..850b282 100644
--- a/src/test/kotlin/com/mapk/core/ToKConstructorTest.kt
+++ b/src/test/kotlin/com/mapk/core/ToKConstructorTest.kt
@@ -1,14 +1,14 @@
 package com.mapk.core
 
 import com.mapk.annotations.KConstructor
-import kotlin.reflect.KFunction
-import kotlin.reflect.full.memberProperties
-import kotlin.reflect.full.primaryConstructor
-import kotlin.reflect.jvm.isAccessible
 import org.junit.jupiter.api.Assertions
 import org.junit.jupiter.api.DisplayName
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.assertThrows
+import kotlin.reflect.KFunction
+import kotlin.reflect.full.memberProperties
+import kotlin.reflect.full.primaryConstructor
+import kotlin.reflect.jvm.isAccessible
 
 @Suppress("UNCHECKED_CAST", "unused")
 @DisplayName("クラスからのコンストラクタ抽出関連テスト")
diff --git a/src/test/kotlin/com/mapk/core/internal/FunctionsTest.kt b/src/test/kotlin/com/mapk/core/internal/FunctionsTest.kt
index ab53cd5..a1ae5a4 100644
--- a/src/test/kotlin/com/mapk/core/internal/FunctionsTest.kt
+++ b/src/test/kotlin/com/mapk/core/internal/FunctionsTest.kt
@@ -4,8 +4,6 @@ import com.mapk.annotations.KParameterAlias
 import com.mapk.annotations.KUseDefaultArgument
 import io.mockk.every
 import io.mockk.mockk
-import java.lang.IllegalArgumentException
-import kotlin.reflect.KParameter
 import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Assertions.assertFalse
 import org.junit.jupiter.api.Assertions.assertTrue
@@ -14,6 +12,7 @@ import org.junit.jupiter.api.DisplayName
 import org.junit.jupiter.api.Nested
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.assertThrows
+import kotlin.reflect.KParameter
 
 @DisplayName("関数類のテスト")
 class FunctionsTest {