diff --git a/base/src/main/java/me/gamercoder215/superadvancements/advancement/extensions.kt b/base/src/main/kotlin/me/gamercoder215/superadvancements/advancement/extensions.kt
similarity index 100%
rename from base/src/main/java/me/gamercoder215/superadvancements/advancement/extensions.kt
rename to base/src/main/kotlin/me/gamercoder215/superadvancements/advancement/extensions.kt
diff --git a/base/src/main/java/me/gamercoder215/superadvancements/advancement/player/extensions.kt b/base/src/main/kotlin/me/gamercoder215/superadvancements/advancement/player/extensions.kt
similarity index 100%
rename from base/src/main/java/me/gamercoder215/superadvancements/advancement/player/extensions.kt
rename to base/src/main/kotlin/me/gamercoder215/superadvancements/advancement/player/extensions.kt
diff --git a/base/src/main/java/me/gamercoder215/superadvancements/util/extensions.kt b/base/src/main/kotlin/me/gamercoder215/superadvancements/util/extensions.kt
similarity index 100%
rename from base/src/main/java/me/gamercoder215/superadvancements/util/extensions.kt
rename to base/src/main/kotlin/me/gamercoder215/superadvancements/util/extensions.kt
diff --git a/build.gradle.kts b/build.gradle.kts
index b120a0f..1531318 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -221,8 +221,6 @@ subprojects {
                 )
             }
 
-            exclude("META-INF", "META-INF/**")
-
             archiveClassifier.set("")
         }
     }
diff --git a/spigot/src/main/java/me/gamercoder215/superadvancements/advancement/spigot-extensions.kt b/spigot/src/main/kotlin/me/gamercoder215/superadvancements/advancement/spigot-extensions.kt
similarity index 100%
rename from spigot/src/main/java/me/gamercoder215/superadvancements/advancement/spigot-extensions.kt
rename to spigot/src/main/kotlin/me/gamercoder215/superadvancements/advancement/spigot-extensions.kt