diff --git a/lib/api_client.js b/lib/api_client.js
index c639220..6469c15 100644
--- a/lib/api_client.js
+++ b/lib/api_client.js
@@ -2102,13 +2102,26 @@ APIClient.prototype.sendTransaction = function(identifier, txHex, paths, checkFe
  * @param identifier        string      the wallet identifier
  * @param webhookIdentifier string      identifier for the webhook
  * @param url               string      URL to receive webhook events
+ * @param confirmations     int         Number of confirmations for which to receive webhook events (defaults to 6)
  * @param [cb]              function    callback(err, webhook)
  * @returns {q.Promise}
  */
-APIClient.prototype.setupWalletWebhook = function(identifier, webhookIdentifier, url, cb) {
+APIClient.prototype.setupWalletWebhook = function(identifier, webhookIdentifier, url, confirmations, cb) {
     var self = this;
 
-    return self.blocktrailClient.post("/wallet/" + identifier + "/webhook", null, {url: url, identifier: webhookIdentifier}, cb);
+    // Include confirmations parameter - Backwards compatible
+    if (typeof confirmations === "function") {
+        cb = confirmations;
+        confirmations = null;
+    }
+
+    var params = {
+        url: url,
+        identifier: webhookIdentifier,
+        confirmations: confirmations
+    };
+
+    return self.blocktrailClient.post("/wallet/" + identifier + "/webhook", null, params, cb);
 };
 
 /**