diff --git a/app/src/main/java/net/foucry/pilldroid/SimpleDividerItemDecoration.java b/app/src/main/java/net/foucry/pilldroid/SimpleDividerItemDecoration.java
index e5d87d1..0532539 100644
--- a/app/src/main/java/net/foucry/pilldroid/SimpleDividerItemDecoration.java
+++ b/app/src/main/java/net/foucry/pilldroid/SimpleDividerItemDecoration.java
@@ -3,6 +3,8 @@ package net.foucry.pilldroid;
 import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.drawable.Drawable;
+
+import androidx.annotation.NonNull;
 import androidx.recyclerview.widget.RecyclerView;
 import android.view.View;
 
@@ -17,7 +19,7 @@ public class SimpleDividerItemDecoration extends RecyclerView.ItemDecoration {
     }
 
     @Override
-    public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
+    public void onDrawOver(@NonNull Canvas c, RecyclerView parent, @NonNull RecyclerView.State state) {
         int left = parent.getPaddingLeft();
         int right = parent.getWidth() - parent.getPaddingRight();