diff --git a/core/chains/evm/config/toml/defaults/Mantle_Mainnet.toml b/core/chains/evm/config/toml/defaults/Mantle_Mainnet.toml
index 98e82d70c5..23d5168a7e 100644
--- a/core/chains/evm/config/toml/defaults/Mantle_Mainnet.toml
+++ b/core/chains/evm/config/toml/defaults/Mantle_Mainnet.toml
@@ -10,7 +10,6 @@ NoNewFinalizedHeadsThreshold = '40m0s'
 HistoryDepth = 1250
 
 [GasEstimator]
-Mode = 'BlockHistory'
 PriceMax = '120 gwei'
 # Limit values are high as Mantle's GasPrice is in native token (MNT) instead of ETH. Their proprietary TokenRatio parameter is used to adjust fees
 LimitDefault = 80_000_000_000
diff --git a/core/chains/evm/config/toml/defaults/Mantle_Sepolia.toml b/core/chains/evm/config/toml/defaults/Mantle_Sepolia.toml
index da45a84833..705f91142f 100644
--- a/core/chains/evm/config/toml/defaults/Mantle_Sepolia.toml
+++ b/core/chains/evm/config/toml/defaults/Mantle_Sepolia.toml
@@ -10,7 +10,6 @@ NoNewFinalizedHeadsThreshold = '60m0s'
 HistoryDepth = 1250
 
 [GasEstimator]
-Mode = 'BlockHistory' 
 PriceMax = '120 gwei'
 # Limit values are high as Mantle's GasPrice is in native token (MNT) instead of ETH. Their proprietary TokenRatio parameter is used to adjust fees
 LimitDefault = 80000000000