diff --git a/custom_config_data/besu.json b/custom_config_data/besu.json
index 70f124b..40e019b 100644
--- a/custom_config_data/besu.json
+++ b/custom_config_data/besu.json
@@ -14,8 +14,7 @@
     "preMergeForkBlock": 0,
     "terminalTotalDifficulty": 0,
     "shanghaiTime": 1694884704,
-    "ethash": {},
-    "cancunTime": 2000000000
+    "ethash": {}
   },
   "alloc": {
     "0x0000000000000000000000000000000000000000": {
diff --git a/custom_config_data/chainspec.json b/custom_config_data/chainspec.json
index 46f5576..9e2e2ca 100644
--- a/custom_config_data/chainspec.json
+++ b/custom_config_data/chainspec.json
@@ -45,12 +45,7 @@
     "eip3855TransitionTimestamp": "0x6505e360",
     "eip3651TransitionTimestamp": "0x6505e360",
     "eip3860TransitionTimestamp": "0x6505e360",
-    "terminalTotalDifficulty": "0x0",
-    "eip4844TransitionTimestamp": "0x77359400",
-    "eip4788TransitionTimestamp": "0x77359400",
-    "eip1153TransitionTimestamp": "0x77359400",
-    "eip5656TransitionTimestamp": "0x77359400",
-    "eip6780TransitionTimestamp": "0x77359400"
+    "terminalTotalDifficulty": "0x0"
   },
   "genesis": {
     "seal": {
diff --git a/custom_config_data/genesis.json b/custom_config_data/genesis.json
index 08d0e50..e909505 100644
--- a/custom_config_data/genesis.json
+++ b/custom_config_data/genesis.json
@@ -14,8 +14,7 @@
     "mergeNetsplitBlock": 0,
     "terminalTotalDifficulty": 0,
     "terminalTotalDifficultyPassed": true,
-    "shanghaiTime": 1694884704,
-    "cancunTime": 2000000000
+    "shanghaiTime": 1694884704
   },
   "alloc": {
     "0x0000000000000000000000000000000000000000": {