diff --git a/app/assets/v2/js/cart.js b/app/assets/v2/js/cart.js
index 9db76764527..00d3fe3c438 100644
--- a/app/assets/v2/js/cart.js
+++ b/app/assets/v2/js/cart.js
@@ -1524,20 +1524,26 @@ Vue.component('grants-cart', {
           throw new Error('Unknown account');
         }
 
+        // Get the first token listed and use that to pay for signing key transaction
+        const syncWalletState = await syncWallet.getAccountState();
+        const tokensInWallet = Object.keys(syncWalletState.committed.balances);
+        const feeToken = tokensInWallet[0];
+
         // Determine how to set key based on wallet type
         let changePubkey;
 
         if (syncWallet.ethSignerType.verificationMethod === 'ECDSA') {
           console.log('  Using ECDSA to set signing key');
-          changePubkey = await syncWallet.setSigningKey();
+          changePubkey = await syncWallet.setSigningKey({ feeToken });
         } else {
           console.log('  Using ERC-1271 to set signing key. This requires an on-chain transaction');
           const signingKeyTx = await syncWallet.onchainAuthSigningKey();
 
-          changePubkey = await syncWallet.setSigningKey('committed', true);
+          changePubkey = await syncWallet.setSigningKey({ feeToken, onchainAuth: true });
         }
 
         // Wait until the tx is committed
+        console.log('Signing key set, waiting for transaction receipt');
         await changePubkey.awaitReceipt();
         console.log('✅ specified sync wallet is ready to use on zkSync');
       } else {
diff --git a/app/grants/templates/grants/cart-vue.html b/app/grants/templates/grants/cart-vue.html
index 6b9460a6e83..c7d17312dfa 100644
--- a/app/grants/templates/grants/cart-vue.html
+++ b/app/grants/templates/grants/cart-vue.html
@@ -906,7 +906,7 @@ <h1 class="font-bigger-4 font-weight-bold mt-2">
     {% comment %} ================================================================= {% endcomment %}
 
     <script type="text/javascript" src="https://cdn.ethers.io/lib/ethers-5.0.umd.min.js"></script>
-    <script src="https://cdn.jsdelivr.net/npm/zksync@0.7.4/dist/main.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/zksync@0.7.5/dist/main.js"></script>
     <script type="text/javascript">
     (async () => {
         // Loads and compiles wasm library