diff --git a/core/metadium_genesis.go b/core/metadium_genesis.go
index 62b9297bc242..289013f32821 100644
--- a/core/metadium_genesis.go
+++ b/core/metadium_genesis.go
@@ -12288,7 +12288,7 @@ var (
   },
   "coinbase": "0x880a74d68b09418136c4442D1eA0f5cC72E5325A",
   "config": {
-    "berlinBlock": 80000000,
+    "berlinBlock": 51960000,
     "chainId": 11,
     "homesteadBlock": 0,
     "eip150Block": 11441000,
@@ -12297,7 +12297,7 @@ var (
     "byzantiumBlock": 0,
     "constantinopleBlock": 11441000,
     "istanbulBlock": 11441000,
-    "londonBlock": 80000000,
+    "londonBlock": 51960000,
     "muirGlacierBlock": 11441000 
   },
   "difficulty": "0x1",
diff --git a/params/config.go b/params/config.go
index c52238cf04a2..25dfb1e0f292 100644
--- a/params/config.go
+++ b/params/config.go
@@ -153,8 +153,8 @@ var (
 		PetersburgBlock:     big.NewInt(11441000),
 		IstanbulBlock:       big.NewInt(11441000),
 		MuirGlacierBlock:    big.NewInt(11441000),
-		BerlinBlock:         big.NewInt(80000000),
-		LondonBlock:         big.NewInt(80000000),
+		BerlinBlock:         big.NewInt(51960000),
+		LondonBlock:         big.NewInt(51960000),
 		Ethash:              new(EthashConfig),
 	}