diff --git a/devtools/chain/specs/multi_nodes/chain-spec.toml b/devtools/chain/specs/multi_nodes/chain-spec.toml
index 63a650f77..34b7c7764 100644
--- a/devtools/chain/specs/multi_nodes/chain-spec.toml
+++ b/devtools/chain/specs/multi_nodes/chain-spec.toml
@@ -74,7 +74,6 @@ brake_ratio = 10
 tx_num_limit = 20000
 max_tx_size = 409600000
 gas_limit = 4294967295000
-gas_price = 1
 interval = 3000
 
 [[params.verifier_list]]
diff --git a/devtools/chain/specs/multi_nodes_short_epoch_len/chain-spec.toml b/devtools/chain/specs/multi_nodes_short_epoch_len/chain-spec.toml
index 73191d932..b346a78d4 100644
--- a/devtools/chain/specs/multi_nodes_short_epoch_len/chain-spec.toml
+++ b/devtools/chain/specs/multi_nodes_short_epoch_len/chain-spec.toml
@@ -74,7 +74,6 @@ brake_ratio = 10
 tx_num_limit = 20000
 max_tx_size = 409600000
 gas_limit = 4294967295000
-gas_price = 1
 interval = 3000
 
 [[params.verifier_list]]
diff --git a/devtools/chain/specs/single_node/chain-spec.toml b/devtools/chain/specs/single_node/chain-spec.toml
index 83d4367a1..e3fa68787 100644
--- a/devtools/chain/specs/single_node/chain-spec.toml
+++ b/devtools/chain/specs/single_node/chain-spec.toml
@@ -74,7 +74,6 @@ brake_ratio = 10
 tx_num_limit = 20000
 max_tx_size = 409600000
 gas_limit = 4294967295000
-gas_price = 1
 interval = 3000
 
 [[params.verifier_list]]