diff --git a/package.json b/package.json
index 571c176..d02cfde 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "@connectrpc/connect-node": "1.4",
     "@connectrpc/connect-web": "1.4",
     "@types/node": "20.14.10",
-    "@utxorpc/spec": "0.12.0",
+    "@utxorpc/spec": "0.14.0",
     "buffer": "^6.0.3"
   },
   "exports": {
diff --git a/src/cardano.ts b/src/cardano.ts
index 72a8ac5..900247e 100644
--- a/src/cardano.ts
+++ b/src/cardano.ts
@@ -313,6 +313,14 @@ export class SubmitClient {
     return res.ref[0];
   }
 
+  async evalTx(tx: TxCbor): Promise<submit.EvalTxResponse> {
+    const res = await this.inner.evalTx({
+      tx: [tx].map((cbor) => ({ type: { case: "raw", value: cbor } })),
+    });
+    
+    return res;
+  }
+
   async *waitForTx(txHash: TxHash): AsyncIterable<submit.Stage> {
     const updates = this.inner.waitForTx({
       ref: [txHash],