diff --git a/src/main/java/roomescape/system/auth/web/support/Admin.java b/src/main/java/roomescape/system/auth/web/support/Admin.kt
similarity index 100%
rename from src/main/java/roomescape/system/auth/web/support/Admin.java
rename to src/main/java/roomescape/system/auth/web/support/Admin.kt
diff --git a/src/main/java/roomescape/system/auth/web/support/LoginRequired.java b/src/main/java/roomescape/system/auth/web/support/LoginRequired.kt
similarity index 100%
rename from src/main/java/roomescape/system/auth/web/support/LoginRequired.java
rename to src/main/java/roomescape/system/auth/web/support/LoginRequired.kt
diff --git a/src/main/java/roomescape/system/auth/web/support/MemberId.java b/src/main/java/roomescape/system/auth/web/support/MemberId.kt
similarity index 100%
rename from src/main/java/roomescape/system/auth/web/support/MemberId.java
rename to src/main/java/roomescape/system/auth/web/support/MemberId.kt