diff --git a/junixsocket-demo/src/main/java/org/newsclub/net/unix/demo/okhttp/OkHttpClientDemo.java b/junixsocket-demo/src/main/java/org/newsclub/net/unix/demo/okhttp/OkHttpClientDemo.java
index 86712d549..102c17284 100644
--- a/junixsocket-demo/src/main/java/org/newsclub/net/unix/demo/okhttp/OkHttpClientDemo.java
+++ b/junixsocket-demo/src/main/java/org/newsclub/net/unix/demo/okhttp/OkHttpClientDemo.java
@@ -28,6 +28,8 @@
 import org.newsclub.net.unix.demo.DemoHelper;
 import org.newsclub.net.unix.demo.nanohttpd.NanoHttpdServerDemo;
 
+import com.kohlschutter.util.IOUtil;
+
 import okhttp3.OkHttpClient;
 import okhttp3.Request;
 import okhttp3.Response;
@@ -60,7 +62,7 @@ public static void main(String[] args) throws IOException {
       ResponseBody body = response.body();
       if (body != null) {
         try (InputStream in = body.byteStream()) { // NOPMD.UseTryWithResources
-          in.transferTo(System.out);
+          IOUtil.transferAllBytes(in, System.out);
         } finally {
           body.close();
         }
diff --git a/junixsocket-demo/src/main/java/org/newsclub/net/unix/demo/okhttp/OkHttpClientTIPCDemo.java b/junixsocket-demo/src/main/java/org/newsclub/net/unix/demo/okhttp/OkHttpClientTIPCDemo.java
index 744ff1beb..5fca3b868 100644
--- a/junixsocket-demo/src/main/java/org/newsclub/net/unix/demo/okhttp/OkHttpClientTIPCDemo.java
+++ b/junixsocket-demo/src/main/java/org/newsclub/net/unix/demo/okhttp/OkHttpClientTIPCDemo.java
@@ -29,6 +29,8 @@
 import org.newsclub.net.unix.demo.DemoHelper;
 import org.newsclub.net.unix.demo.nanohttpd.NanoHttpdServerDemo;
 
+import com.kohlschutter.util.IOUtil;
+
 import okhttp3.OkHttpClient;
 import okhttp3.Request;
 import okhttp3.Response;
@@ -74,7 +76,7 @@ public static void main(String[] args) throws IOException, InterruptedException
         ResponseBody body = response.body();
         if (body != null) {
           try (InputStream in = body.byteStream()) { // NOPMD.UseTryWithResources
-            in.transferTo(System.out);
+            IOUtil.transferAllBytes(in, System.out);
           } finally {
             body.close();
           }