diff --git a/src/main/java/org/cubewhy/celestial/game/AuthServer.java b/src/main/kotlin/org/cubewhy/celestial/game/AuthServer.kt
similarity index 100%
rename from src/main/java/org/cubewhy/celestial/game/AuthServer.java
rename to src/main/kotlin/org/cubewhy/celestial/game/AuthServer.kt
diff --git a/src/main/java/org/cubewhy/celestial/gui/GuiLauncher.java b/src/main/kotlin/org/cubewhy/celestial/gui/GuiLauncher.kt
similarity index 100%
rename from src/main/java/org/cubewhy/celestial/gui/GuiLauncher.java
rename to src/main/kotlin/org/cubewhy/celestial/gui/GuiLauncher.kt
diff --git a/src/main/java/org/cubewhy/celestial/gui/Language.java b/src/main/kotlin/org/cubewhy/celestial/gui/Language.kt
similarity index 100%
rename from src/main/java/org/cubewhy/celestial/gui/Language.java
rename to src/main/kotlin/org/cubewhy/celestial/gui/Language.kt
diff --git a/src/main/java/org/cubewhy/celestial/gui/LauncherNews.java b/src/main/kotlin/org/cubewhy/celestial/gui/LauncherNews.kt
similarity index 100%
rename from src/main/java/org/cubewhy/celestial/gui/LauncherNews.java
rename to src/main/kotlin/org/cubewhy/celestial/gui/LauncherNews.kt
diff --git a/src/main/java/org/cubewhy/celestial/gui/pages/GuiAbout.java b/src/main/kotlin/org/cubewhy/celestial/gui/pages/GuiAbout.kt
similarity index 100%
rename from src/main/java/org/cubewhy/celestial/gui/pages/GuiAbout.java
rename to src/main/kotlin/org/cubewhy/celestial/gui/pages/GuiAbout.kt
diff --git a/src/main/java/org/cubewhy/celestial/gui/pages/GuiNews.java b/src/main/kotlin/org/cubewhy/celestial/gui/pages/GuiNews.kt
similarity index 100%
rename from src/main/java/org/cubewhy/celestial/gui/pages/GuiNews.java
rename to src/main/kotlin/org/cubewhy/celestial/gui/pages/GuiNews.kt
diff --git a/src/main/java/org/cubewhy/celestial/gui/pages/GuiPlugins.java b/src/main/kotlin/org/cubewhy/celestial/gui/pages/GuiPlugins.kt
similarity index 100%
rename from src/main/java/org/cubewhy/celestial/gui/pages/GuiPlugins.java
rename to src/main/kotlin/org/cubewhy/celestial/gui/pages/GuiPlugins.kt
diff --git a/src/main/java/org/cubewhy/celestial/gui/pages/GuiSettings.java b/src/main/kotlin/org/cubewhy/celestial/gui/pages/GuiSettings.kt
similarity index 100%
rename from src/main/java/org/cubewhy/celestial/gui/pages/GuiSettings.java
rename to src/main/kotlin/org/cubewhy/celestial/gui/pages/GuiSettings.kt
diff --git a/src/main/java/org/cubewhy/celestial/gui/pages/GuiVersion.java b/src/main/kotlin/org/cubewhy/celestial/gui/pages/GuiVersion.kt
similarity index 100%
rename from src/main/java/org/cubewhy/celestial/gui/pages/GuiVersion.java
rename to src/main/kotlin/org/cubewhy/celestial/gui/pages/GuiVersion.kt