diff --git a/app/src/main/java/com/wbrawner/simplemarkdown/AppComponent.java b/app/src/main/java/com/wbrawner/simplemarkdown/AppComponent.java
deleted file mode 100644
index 56892bb..0000000
--- a/app/src/main/java/com/wbrawner/simplemarkdown/AppComponent.java
+++ /dev/null
@@ -1,35 +0,0 @@
-package com.wbrawner.simplemarkdown;
-
-import android.content.Context;
-
-import com.wbrawner.simplemarkdown.view.activity.MainActivity;
-import com.wbrawner.simplemarkdown.view.activity.SplashActivity;
-import com.wbrawner.simplemarkdown.view.fragment.EditFragment;
-import com.wbrawner.simplemarkdown.view.fragment.PreviewFragment;
-
-import javax.inject.Singleton;
-
-import dagger.BindsInstance;
-import dagger.Component;
-
-/**
- * Created by billy on 8/22/17.
- */
-
-@Singleton
-@Component(modules = { AppModule.class })
-public interface AppComponent {
-    void inject(MarkdownApplication application);
-    void inject(MainActivity activity);
-    void inject(SplashActivity activity);
-    void inject(EditFragment fragment);
-    void inject(PreviewFragment fragment);
-
-    @Component.Builder
-    abstract class Builder {
-        @BindsInstance
-        abstract Builder context(Context context);
-
-        abstract AppComponent build();
-    }
-}
diff --git a/app/src/main/java/com/wbrawner/simplemarkdown/AppComponent.kt b/app/src/main/java/com/wbrawner/simplemarkdown/AppComponent.kt
new file mode 100644
index 0000000..c6e2c46
--- /dev/null
+++ b/app/src/main/java/com/wbrawner/simplemarkdown/AppComponent.kt
@@ -0,0 +1,28 @@
+package com.wbrawner.simplemarkdown
+
+import android.content.Context
+import com.wbrawner.simplemarkdown.view.activity.MainActivity
+import com.wbrawner.simplemarkdown.view.activity.SplashActivity
+import com.wbrawner.simplemarkdown.view.fragment.EditFragment
+import com.wbrawner.simplemarkdown.view.fragment.PreviewFragment
+import dagger.BindsInstance
+import dagger.Component
+import javax.inject.Singleton
+
+@Singleton
+@Component(modules = [AppModule::class])
+interface AppComponent {
+    fun inject(application: MarkdownApplication)
+    fun inject(activity: MainActivity)
+    fun inject(activity: SplashActivity)
+    fun inject(fragment: EditFragment)
+    fun inject(fragment: PreviewFragment)
+
+    @Component.Builder
+    abstract class Builder {
+        @BindsInstance
+        internal abstract fun context(context: Context): Builder
+
+        internal abstract fun build(): AppComponent
+    }
+}