diff --git a/rust/pkg/cardano_serialization_lib.js.flow b/rust/pkg/cardano_serialization_lib.js.flow
index dcd25d70..2a66c8ec 100644
--- a/rust/pkg/cardano_serialization_lib.js.flow
+++ b/rust/pkg/cardano_serialization_lib.js.flow
@@ -5342,6 +5342,14 @@ declare export class TransactionBuilderConfigBuilder {
    */
   fee_algo(fee_algo: LinearFee): TransactionBuilderConfigBuilder;
 
+  /**
+   * @param {BigNum} coins_per_utxo_word
+   * @returns {TransactionBuilderConfigBuilder}
+   */
+  coins_per_utxo_word(
+    coins_per_utxo_word: BigNum
+  ): TransactionBuilderConfigBuilder;
+
   /**
    * @param {BigNum} pool_deposit
    * @returns {TransactionBuilderConfigBuilder}
@@ -5366,14 +5374,6 @@ declare export class TransactionBuilderConfigBuilder {
    */
   max_tx_size(max_tx_size: number): TransactionBuilderConfigBuilder;
 
-  /**
-   * @param {BigNum} coins_per_utxo_word
-   * @returns {TransactionBuilderConfigBuilder}
-   */
-  coins_per_utxo_word(
-    coins_per_utxo_word: BigNum
-  ): TransactionBuilderConfigBuilder;
-
   /**
    * @param {boolean} prefer_pure_change
    * @returns {TransactionBuilderConfigBuilder}
diff --git a/rust/src/tx_builder.rs b/rust/src/tx_builder.rs
index 7c81d149..f1d46c5d 100644
--- a/rust/src/tx_builder.rs
+++ b/rust/src/tx_builder.rs
@@ -190,18 +190,23 @@ impl TransactionBuilderConfigBuilder {
         }
     }
 
-    pub fn fee_algo(mut self, fee_algo: fees::LinearFee) -> Self {
-        self.fee_algo = Some(fee_algo);
+    pub fn fee_algo(mut self, fee_algo: &fees::LinearFee) -> Self {
+        self.fee_algo = Some(fee_algo.clone());
         self
     }
 
-    pub fn pool_deposit(mut self, pool_deposit: BigNum) -> Self {
-        self.pool_deposit = Some(pool_deposit);
+    pub fn coins_per_utxo_word(mut self, coins_per_utxo_word: &Coin) -> Self {
+        self.coins_per_utxo_word = Some(coins_per_utxo_word.clone());
         self
     }
 
-    pub fn key_deposit(mut self, key_deposit: BigNum) -> Self {
-        self.key_deposit = Some(key_deposit);
+    pub fn pool_deposit(mut self, pool_deposit: &BigNum) -> Self {
+        self.pool_deposit = Some(pool_deposit.clone());
+        self
+    }
+
+    pub fn key_deposit(mut self, key_deposit: &BigNum) -> Self {
+        self.key_deposit = Some(key_deposit.clone());
         self
     }
 
@@ -215,11 +220,6 @@ impl TransactionBuilderConfigBuilder {
         self
     }
 
-    pub fn coins_per_utxo_word(mut self, coins_per_utxo_word: Coin) -> Self {
-        self.coins_per_utxo_word = Some(coins_per_utxo_word);
-        self
-    }
-
     pub fn prefer_pure_change(mut self, prefer_pure_change: bool) -> Self {
         self.prefer_pure_change = prefer_pure_change;
         self
@@ -1134,12 +1134,12 @@ mod tests {
         coins_per_utxo_word: u64,
     ) -> TransactionBuilder {
         let cfg = TransactionBuilderConfigBuilder::new()
-            .fee_algo(linear_fee.clone())
-            .pool_deposit(to_bignum(pool_deposit))
-            .key_deposit(to_bignum(key_deposit))
+            .fee_algo(linear_fee)
+            .pool_deposit(&to_bignum(pool_deposit))
+            .key_deposit(&to_bignum(key_deposit))
             .max_value_size(max_val_size)
             .max_tx_size(MAX_TX_SIZE)
-            .coins_per_utxo_word(to_bignum(coins_per_utxo_word))
+            .coins_per_utxo_word(&to_bignum(coins_per_utxo_word))
             .build()
             .unwrap();
         TransactionBuilder::new(&cfg)
@@ -1173,12 +1173,12 @@ mod tests {
 
     fn create_tx_builder_with_fee_and_pure_change(linear_fee: &LinearFee) -> TransactionBuilder {
         TransactionBuilder::new(&TransactionBuilderConfigBuilder::new()
-            .fee_algo(linear_fee.clone())
-            .pool_deposit(to_bignum(1))
-            .key_deposit(to_bignum(1))
+            .fee_algo(linear_fee)
+            .pool_deposit(&to_bignum(1))
+            .key_deposit(&to_bignum(1))
             .max_value_size(MAX_VALUE_SIZE)
             .max_tx_size(MAX_TX_SIZE)
-            .coins_per_utxo_word(to_bignum(1))
+            .coins_per_utxo_word(&to_bignum(1))
             .prefer_pure_change(true)
             .build()
             .unwrap())
@@ -2589,12 +2589,12 @@ mod tests {
         // we have a = 1 to test increasing fees when more inputs are added
         let linear_fee = LinearFee::new(&to_bignum(1), &to_bignum(0));
         let cfg = TransactionBuilderConfigBuilder::new()
-            .fee_algo(linear_fee)
-            .pool_deposit(to_bignum(0))
-            .key_deposit(to_bignum(0))
+            .fee_algo(&linear_fee)
+            .pool_deposit(&to_bignum(0))
+            .key_deposit(&to_bignum(0))
             .max_value_size(9999)
             .max_tx_size(9999)
-            .coins_per_utxo_word(Coin::zero())
+            .coins_per_utxo_word(&Coin::zero())
             .build()
             .unwrap();
         let mut tx_builder = TransactionBuilder::new(&cfg);
@@ -2616,12 +2616,12 @@ mod tests {
         // we have a = 1 to test increasing fees when more inputs are added
         let linear_fee = LinearFee::new(&to_bignum(1), &to_bignum(0));
         let cfg = TransactionBuilderConfigBuilder::new()
-            .fee_algo(linear_fee)
-            .pool_deposit(to_bignum(0))
-            .key_deposit(to_bignum(0))
+            .fee_algo(&linear_fee)
+            .pool_deposit(&to_bignum(0))
+            .key_deposit(&to_bignum(0))
             .max_value_size(9999)
             .max_tx_size(9999)
-            .coins_per_utxo_word(Coin::zero())
+            .coins_per_utxo_word(&Coin::zero())
             .build()
             .unwrap();
         let mut tx_builder = TransactionBuilder::new(&cfg);