diff --git a/app/src/main/java/com/hippo/preference/UrlPreference.java b/app/src/main/java/com/hippo/preference/UrlPreference.kt
similarity index 100%
rename from app/src/main/java/com/hippo/preference/UrlPreference.java
rename to app/src/main/java/com/hippo/preference/UrlPreference.kt