diff --git a/apps/wallet-mobile/src/yoroi-wallets/cardano/cip30/cip30.ts b/apps/wallet-mobile/src/yoroi-wallets/cardano/cip30/cip30.ts
index 19732455eb..133edaa5fe 100644
--- a/apps/wallet-mobile/src/yoroi-wallets/cardano/cip30/cip30.ts
+++ b/apps/wallet-mobile/src/yoroi-wallets/cardano/cip30/cip30.ts
@@ -203,10 +203,10 @@ class CIP30Extension {
       const tx = await csl.Transaction.fromHex(cbor)
       const txBody = await tx.body()
       const signedTx = await csl.Transaction.new(txBody, witnesses, undefined)
+      const signedTxBytes = await signedTx.toBytes()
 
-      const txId = await (await hashTransaction(csl, signedTx)).toHex()
+      const txId = await (await hashTransaction(csl, signedTxBytes)).toHex()
 
-      const signedTxBytes = await signedTx.toBytes()
       await this.wallet.submitTransaction(Buffer.from(signedTxBytes).toString('base64'))
       return getTransactionUnspentOutput({
         txId,
diff --git a/packages/common/src/numbers/to-bigint.ts b/packages/common/src/numbers/to-bigint.ts
index a1564a8424..7a631f51cc 100644
--- a/packages/common/src/numbers/to-bigint.ts
+++ b/packages/common/src/numbers/to-bigint.ts
@@ -26,7 +26,7 @@ export function toBigInt(
     typeof quantity === 'string'
       ? quantity.replace(/(?!^-)[^\d.-]/g, '')
       : quantity
-  const bigNumber = BigNumber(sanitized || 0)
+  const bigNumber = new BigNumber(sanitized || 0)
 
   const scaledNumber = bigNumber.shiftedBy(decimalPlaces)
 
diff --git a/packages/dapp-connector/src/resolver.ts b/packages/dapp-connector/src/resolver.ts
index 75ceed8a95..eb308a7b12 100644
--- a/packages/dapp-connector/src/resolver.ts
+++ b/packages/dapp-connector/src/resolver.ts
@@ -119,8 +119,8 @@ export const resolver: Resolver = {
 
       if (result === null || result.length === 0) {
         const balance = await context.wallet.getBalance('*')
-        const coin = BigNumber(await (await balance.coin()).toStr())
-        if (coin.isGreaterThan(BigNumber(value))) {
+        const coin = new BigNumber(await (await balance.coin()).toStr())
+        if (coin.isGreaterThan(new BigNumber(value))) {
           try {
             const utxo = await context.wallet.sendReorganisationTx(value)
             return [await utxo.toHex()]