diff --git a/rust/config/testnet4_config.json b/rust/config/testnet4_config.json
index 6679cc0056..12621e6035 100644
--- a/rust/config/testnet4_config.json
+++ b/rust/config/testnet4_config.json
@@ -1028,7 +1028,7 @@
       "prefix": "dual",
       "index": {
         "from": 1,
-        "chunk": 1000
+        "chunk": 100000
       },
       "blocks": {
         "reorgPeriod": 1