diff --git a/hydra-cluster/config/devnet/genesis-conway.json b/hydra-cluster/config/devnet/genesis-conway.json
index 7bccdf13f3c..de4a7d831e1 100644
--- a/hydra-cluster/config/devnet/genesis-conway.json
+++ b/hydra-cluster/config/devnet/genesis-conway.json
@@ -37,5 +37,6 @@
     "threshold": 0
   },
   "minFeeRefScriptCostPerByte": 0,
-  "plutusV3CostModel":[]
+  "plutusV3CostModel":[],
+  "extraPraosEntropy": 0
 }