diff --git a/op/bob/sepolia/rollup.json b/op/bob/sepolia/rollup.json
index 8b78638b..83314a36 100644
--- a/op/bob/sepolia/rollup.json
+++ b/op/bob/sepolia/rollup.json
@@ -30,6 +30,11 @@
     "batch_inbox_address": "0x734dde12fd466c14a85de838788efe6f1993c84c",
     "deposit_contract_address": "0xbaaf3bafdbd660380938b27d21c31bb7d072a799",
     "l1_system_config_address": "0x3974436fa4bb4deb5a04ace51a704b10ff5a1f25",
-    "protocol_versions_address": "0x0000000000000000000000000000000000000000"
+    "protocol_versions_address": "0x0000000000000000000000000000000000000000",
+    "chain_op_config": {
+      "eip1559Elasticity": 6,
+      "eip1559Denominator": 50,
+      "eip1559DenominatorCanyon": 250
+    }
   }
   
\ No newline at end of file