diff --git a/apps/el-gen/genesis_besu.py b/apps/el-gen/genesis_besu.py
index 11c9298..02a4a07 100644
--- a/apps/el-gen/genesis_besu.py
+++ b/apps/el-gen/genesis_besu.py
@@ -37,19 +37,19 @@
     out = {
         "config": {
             "chainId": int(data['chain_id']),
-            "homesteadBlock":0,
-            "eip150Block":0,
-            "eip155Block":0,
-            "eip158Block":0,
-            "byzantiumBlock":0,
-            "constantinopleBlock":0,
-            "petersburgBlock":0,
-            "istanbulBlock":0,
-            "berlinBlock":0,
-            "londonBlock":0,
-            "preMergeForkBlock":0,
-            "terminalTotalDifficulty":0,
-            "shanghaiTime": int(data['genesis_timestamp'] + data['genesis_delay']),
+            "homesteadBlock": 0,
+            "eip150Block": 0,
+            "eip155Block": 0,
+            "eip158Block": 0,
+            "byzantiumBlock": 0,
+            "constantinopleBlock": 0,
+            "petersburgBlock": 0,
+            "istanbulBlock": 0,
+            "berlinBlock": 0,
+            "londonBlock": 0,
+            "mergeNetsplitBlock": 0,
+            "terminalTotalDifficulty": 0,
+            "shanghaiTime": 0,
         },
         "alloc": {
             # Allocate 1 wei to all possible pre-compiles.
@@ -105,7 +105,6 @@
             }
         },
         "coinbase": "0x0000000000000000000000000000000000000000",
-        "baseFeePerGas": "0x3B9ACA00",
         "difficulty": "0x01",
         "extraData": "",
         "gasLimit": "0x17D7840",