diff --git a/src/main/java/roomescape/system/auth/web/support/Admin.kt b/src/main/java/roomescape/system/auth/web/support/Admin.kt
index 683f151e..5e5285e7 100644
--- a/src/main/java/roomescape/system/auth/web/support/Admin.kt
+++ b/src/main/java/roomescape/system/auth/web/support/Admin.kt
@@ -1,11 +1,5 @@
-package roomescape.system.auth.web.support;
+package roomescape.system.auth.web.support
 
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-@Target(ElementType.METHOD)
-@Retention(RetentionPolicy.RUNTIME)
-public @interface Admin {
-}
+@Target(AnnotationTarget.FUNCTION)
+@Retention(AnnotationRetention.RUNTIME)
+annotation class Admin 
diff --git a/src/main/java/roomescape/system/auth/web/support/LoginRequired.kt b/src/main/java/roomescape/system/auth/web/support/LoginRequired.kt
index cbbfa3d7..0e751ded 100644
--- a/src/main/java/roomescape/system/auth/web/support/LoginRequired.kt
+++ b/src/main/java/roomescape/system/auth/web/support/LoginRequired.kt
@@ -1,11 +1,5 @@
-package roomescape.system.auth.web.support;
+package roomescape.system.auth.web.support
 
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-@Target(ElementType.METHOD)
-@Retention(RetentionPolicy.RUNTIME)
-public @interface LoginRequired {
-}
+@Target(AnnotationTarget.FUNCTION)
+@Retention(AnnotationRetention.RUNTIME)
+annotation class LoginRequired 
diff --git a/src/main/java/roomescape/system/auth/web/support/MemberId.kt b/src/main/java/roomescape/system/auth/web/support/MemberId.kt
index ca2b5752..45711d4f 100644
--- a/src/main/java/roomescape/system/auth/web/support/MemberId.kt
+++ b/src/main/java/roomescape/system/auth/web/support/MemberId.kt
@@ -1,11 +1,5 @@
-package roomescape.system.auth.web.support;
+package roomescape.system.auth.web.support
 
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-@Target(ElementType.PARAMETER)
-@Retention(RetentionPolicy.RUNTIME)
-public @interface MemberId {
-}
+@Target(AnnotationTarget.VALUE_PARAMETER)
+@Retention(AnnotationRetention.RUNTIME)
+annotation class MemberId