diff --git a/copyparty/web/up2k.js b/copyparty/web/up2k.js
index ae357732..3f453533 100644
--- a/copyparty/web/up2k.js
+++ b/copyparty/web/up2k.js
@@ -740,7 +740,7 @@ function up2k_init(have_crypto) {
     function hashing_permitted() {
         if (multitask) {
             var ahead = st.bytes.hashed - st.bytes.uploaded;
-            return ahead < 1024 * 1024 * 128 &&
+            return ahead < 1024 * 1024 * 1024 * 4 &&
                 st.todo.handshake.length + st.busy.handshake.length < 16;
         }
         return handshakes_permitted() && 0 ==