diff --git a/parity/cli/config.full.toml b/parity/cli/config.full.toml
index 0cc365231..cffb0737e 100644
--- a/parity/cli/config.full.toml
+++ b/parity/cli/config.full.toml
@@ -101,7 +101,7 @@ reseal_min_period = 4000
 reseal_max_period = 60000
 work_queue_size = 20
 relay_set = "cheap"
-min_gas_price = ""
+min_gas_price = 0
 usd_per_tx = "0.0025"
 usd_per_eth = "auto"
 price_update_period = "hourly"
diff --git a/parity/cli/mod.rs b/parity/cli/mod.rs
index 02dc18d38..d8184d5d5 100644
--- a/parity/cli/mod.rs
+++ b/parity/cli/mod.rs
@@ -269,7 +269,7 @@ usage! {
 			or |c: &Config| otry!(c.mining).tx_time_limit.clone().map(Some),
 		flag_relay_set: String = "cheap",
 			or |c: &Config| otry!(c.mining).relay_set.clone(),
-		flag_min_gas_price: Option<String> = None,
+		flag_min_gas_price: Option<u64> = None,
 			or |c: &Config| otry!(c.mining).min_gas_price.clone().map(Some),
 		flag_usd_per_tx: String = "0.0025",
 			or |c: &Config| otry!(c.mining).usd_per_tx.clone(),
@@ -544,7 +544,7 @@ struct Mining {
 	tx_gas_limit: Option<String>,
 	tx_time_limit: Option<u64>,
 	relay_set: Option<String>,
-	min_gas_price: Option<String>,
+	min_gas_price: Option<u64>,
 	usd_per_tx: Option<String>,
 	usd_per_eth: Option<String>,
 	price_update_period: Option<String>,
@@ -811,7 +811,7 @@ mod tests {
 			flag_tx_gas_limit: Some("6283184".into()),
 			flag_tx_time_limit: Some(100u64),
 			flag_relay_set: "cheap".into(),
-			flag_min_gas_price: Some("".into()),
+			flag_min_gas_price: Some(0u64),
 			flag_usd_per_tx: "0.0025".into(),
 			flag_usd_per_eth: "auto".into(),
 			flag_price_update_period: "hourly".into(),
diff --git a/parity/cli/presets/config.dev.toml b/parity/cli/presets/config.dev.toml
index 912a9ffac..f38e17348 100644
--- a/parity/cli/presets/config.dev.toml
+++ b/parity/cli/presets/config.dev.toml
@@ -3,4 +3,4 @@ chain = "dev"
 
 [mining]
 reseal_min_period = 0
-min_gas_price = "0"
\ No newline at end of file
+min_gas_price = 0
\ No newline at end of file
diff --git a/parity/cli/usage.txt b/parity/cli/usage.txt
index 60a8229ed..e8cc755bb 100644
--- a/parity/cli/usage.txt
+++ b/parity/cli/usage.txt
@@ -295,7 +295,7 @@ Sealing/Mining Options:
                                    means we relay nothing if not mining);
                                    lenient - Same as strict when mining, and cheap
                                    when not (default: {flag_relay_set}).
-  --min-gas-price STRING           Minimum amount of Wei per GAS to be paid for a
+  --min-gas-price WEI              Minimum amount of Wei per GAS to be paid for a
                                    transaction to be accepted for mining. Overrides
                                    --basic-tx-usd.
                                    (default: {flag_min_gas_price:?})
diff --git a/parity/configuration.rs b/parity/configuration.rs
index 14c927c10..4932b3bfd 100644
--- a/parity/configuration.rs
+++ b/parity/configuration.rs
@@ -621,8 +621,8 @@ impl Configuration {
 
 		if let Some(dec) = self.args.flag_gasprice.as_ref() {
 			return Ok(GasPricerConfig::Fixed(to_u256(dec)?));
-		} else if let Some(dec) = self.args.flag_min_gas_price.as_ref() {
-			return Ok(GasPricerConfig::Fixed(to_u256(dec)?));
+		} else if let Some(dec) = self.args.flag_min_gas_price {
+			return Ok(GasPricerConfig::Fixed(U256::from(dec)));
 		}
 
 		let usd_per_tx = to_price(&self.args.flag_usd_per_tx)?;