diff --git a/core-util/src/main/java/org/signal/core/util/StreamUtil.java b/core-util/src/main/java/org/signal/core/util/StreamUtil.java
index b6ba0ba08..c3cfcd5f7 100644
--- a/core-util/src/main/java/org/signal/core/util/StreamUtil.java
+++ b/core-util/src/main/java/org/signal/core/util/StreamUtil.java
@@ -78,7 +78,7 @@ public final class StreamUtil {
   }
 
   public static long copy(InputStream in, OutputStream out) throws IOException {
-    byte[] buffer = new byte[8192];
+    byte[] buffer = new byte[64 * 1024];
     int read;
     long total = 0;