diff --git a/bin/katana/src/cli/node.rs b/bin/katana/src/cli/node.rs
index c187f4fe59..461fc6e036 100644
--- a/bin/katana/src/cli/node.rs
+++ b/bin/katana/src/cli/node.rs
@@ -360,11 +360,8 @@ impl NodeArgs {
             }
         }
 
-        if self.starknet == StarknetOptions::default() {
-            if let Some(starknet) = config.starknet {
-                self.starknet = starknet;
-            }
-        }
+        self.starknet.merge(config.starknet.as_ref());
+        self.development.merge(config.development.as_ref());
 
         if self.gpo == GasPriceOracleOptions::default() {
             if let Some(gpo) = config.gpo {
@@ -378,12 +375,6 @@ impl NodeArgs {
             }
         }
 
-        if self.development == DevOptions::default() {
-            if let Some(development) = config.development {
-                self.development = development;
-            }
-        }
-
         #[cfg(feature = "slot")]
         if self.slot == SlotOptions::default() {
             if let Some(slot) = config.slot {
@@ -509,6 +500,8 @@ PREFUNDED ACCOUNTS
 
 #[cfg(test)]
 mod test {
+    use std::str::FromStr;
+
     use assert_matches::assert_matches;
     use katana_core::constants::{
         DEFAULT_ETH_L1_DATA_GAS_PRICE, DEFAULT_ETH_L1_GAS_PRICE, DEFAULT_STRK_L1_DATA_GAS_PRICE,
@@ -518,7 +511,7 @@ mod test {
         DEFAULT_INVOCATION_MAX_STEPS, DEFAULT_VALIDATION_MAX_STEPS,
     };
     use katana_primitives::chain::ChainId;
-    use katana_primitives::{address, felt};
+    use katana_primitives::{address, felt, Felt};
 
     use super::*;
 
@@ -694,6 +687,8 @@ total_accounts = 20
 
 [starknet.env]
 validate_max_steps = 500
+invoke_max_steps = 9988
+chain_id.Named = "Mainnet"
         "#;
         let path = std::env::temp_dir().join("katana-config.json");
         std::fs::write(&path, content).unwrap();
@@ -710,14 +705,15 @@ validate_max_steps = 500
             "1234",
             "--dev",
             "--dev.no-fee",
+            "--chain-id",
+            "0x123",
         ];
 
         let config =
             NodeArgs::parse_from(args.clone()).with_config_file().unwrap().config().unwrap();
 
         assert_eq!(config.execution.validation_max_steps, 1234);
-        assert_eq!(config.execution.invocation_max_steps, 10_000_000);
-        assert_eq!(config.chain.id, ChainId::parse("KATANA").unwrap());
+        assert_eq!(config.execution.invocation_max_steps, 9988);
         assert!(!config.dev.fee);
         assert_matches!(config.dev.fixed_gas_prices, Some(prices) => {
             assert_eq!(prices.gas_price.eth, 254);
@@ -732,5 +728,6 @@ validate_max_steps = 500
         assert_eq!(config.chain.genesis.sequencer_address, address!("0x100"));
         assert_eq!(config.chain.genesis.gas_prices.eth, 9999);
         assert_eq!(config.chain.genesis.gas_prices.strk, 8888);
+        assert_eq!(config.chain.id, ChainId::Id(Felt::from_str("0x123").unwrap()));
     }
 }
diff --git a/bin/katana/src/cli/options.rs b/bin/katana/src/cli/options.rs
index c915ce3118..83b90eb0b5 100644
--- a/bin/katana/src/cli/options.rs
+++ b/bin/katana/src/cli/options.rs
@@ -108,6 +108,18 @@ pub struct StarknetOptions {
     pub genesis: Option<Genesis>,
 }
 
+impl StarknetOptions {
+    pub fn merge(&mut self, other: Option<&Self>) {
+        if let Some(other) = other {
+            self.environment.merge(Some(&other.environment));
+
+            if self.genesis.is_none() {
+                self.genesis = other.genesis.clone();
+            }
+        }
+    }
+}
+
 #[derive(Debug, Args, Clone, Serialize, Deserialize, PartialEq)]
 #[command(next_help_heading = "Environment options")]
 pub struct EnvironmentOptions {
@@ -143,6 +155,24 @@ impl Default for EnvironmentOptions {
     }
 }
 
+impl EnvironmentOptions {
+    pub fn merge(&mut self, other: Option<&Self>) {
+        if let Some(other) = other {
+            if self.chain_id.is_none() {
+                self.chain_id = other.chain_id;
+            }
+
+            if self.validate_max_steps == DEFAULT_VALIDATION_MAX_STEPS {
+                self.validate_max_steps = other.validate_max_steps;
+            }
+
+            if self.invoke_max_steps == DEFAULT_INVOCATION_MAX_STEPS {
+                self.invoke_max_steps = other.invoke_max_steps;
+            }
+        }
+    }
+}
+
 #[derive(Debug, Args, Clone, Serialize, Deserialize, PartialEq)]
 #[command(next_help_heading = "Development options")]
 #[serde(rename = "dev")]
@@ -192,6 +222,32 @@ impl Default for DevOptions {
     }
 }
 
+impl DevOptions {
+    pub fn merge(&mut self, other: Option<&Self>) {
+        if let Some(other) = other {
+            if !self.dev {
+                self.dev = other.dev;
+            }
+
+            if self.seed == DEFAULT_DEV_SEED {
+                self.seed = other.seed.clone();
+            }
+
+            if self.total_accounts == DEFAULT_DEV_ACCOUNTS {
+                self.total_accounts = other.total_accounts;
+            }
+
+            if !self.no_fee {
+                self.no_fee = other.no_fee;
+            }
+
+            if !self.no_account_validation {
+                self.no_account_validation = other.no_account_validation;
+            }
+        }
+    }
+}
+
 #[derive(Debug, Args, Clone, Serialize, Deserialize, Default, PartialEq)]
 #[command(next_help_heading = "Forking options")]
 pub struct ForkingOptions {