diff --git a/app/src/main/java/org/grapheneos/pdfviewer/PdfViewer.java b/app/src/main/java/org/grapheneos/pdfviewer/PdfViewer.java
index 15ba7f9..52f6aac 100644
--- a/app/src/main/java/org/grapheneos/pdfviewer/PdfViewer.java
+++ b/app/src/main/java/org/grapheneos/pdfviewer/PdfViewer.java
@@ -6,6 +6,7 @@ import android.content.Intent;
 import android.content.res.ColorStateList;
 import android.graphics.Color;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.Gravity;
@@ -23,6 +24,7 @@ import android.webkit.WebViewClient;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.loader.app.LoaderManager;
 import androidx.loader.content.Loader;
@@ -37,6 +39,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Objects;
 
 public class PdfViewer extends AppCompatActivity implements LoaderManager.LoaderCallbacks<List<CharSequence>> {
     public static final String TAG = "PdfViewer";
@@ -163,7 +166,10 @@ public class PdfViewer extends AppCompatActivity implements LoaderManager.Loader
         }
 
         mWebView.setOnApplyWindowInsetsListener((view, insets) -> {
-            windowInsetTop = insets.getSystemWindowInsetTop();
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)
+                insets.getInsets(windowInsetTop);
+            else
+                windowInsetTop = insets.getSystemWindowInsetTop();
             mWebView.evaluateJavascript("updateInset()", null);
             return insets;
         });