diff --git a/src/main/java/roomescape/payment/infrastructure/client/TossPaymentClient.java b/src/main/java/roomescape/payment/infrastructure/client/TossPaymentClient.kt
similarity index 100%
rename from src/main/java/roomescape/payment/infrastructure/client/TossPaymentClient.java
rename to src/main/java/roomescape/payment/infrastructure/client/TossPaymentClient.kt