diff --git a/lib/index.js b/lib/index.js
index 0bce1df..07dc592 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -24,10 +24,9 @@ function Client(transferServer) {
      *
      * @param endpoint (string), e.g. /deposit
      * @param params (object), a list of GET parameters to be included in the request
-     * @param callback (function), processes the response
      */
-    this.get = async function(endpoint, params, callback) {
-        return await sendRequest('get', endpoint, params, callback);
+    this.get = async function(endpoint, params) {
+        return await sendRequest('get', endpoint, params);
     };
 
     /**
@@ -35,10 +34,9 @@ function Client(transferServer) {
      *
      * @param endpoint (string)
      * @param params (object), a list of POST parameters to be included in the request
-     * @param callback (function), processes the response
      */
-    this.post = async function(endpoint, params, callback) {
-        return await sendRequest('post', endpoint, params, callback);
+    this.post = async function(endpoint, params) {
+        return await sendRequest('post', endpoint, params);
     };
 
     /**
@@ -46,10 +44,9 @@ function Client(transferServer) {
      *
      * @param endpoint (string)
      * @param params (object), a list of PUT parameters to be included in the request
-     * @param callback (function), processes the response
      */
-    this.put = async function(endpoint, params, callback) {
-        return await sendRequest('put', endpoint, params, callback);
+    this.put = async function(endpoint, params) {
+        return await sendRequest('put', endpoint, params);
     };
 
     /**
@@ -57,10 +54,9 @@ function Client(transferServer) {
      *
      * @param endpoint (string)
      * @param params (object), a list of DELETE parameters to be included in the request
-     * @param callback (function), processes the response
      */
-    this.delete = async function(endpoint, params, callback) {
-        return await sendRequest('delete', endpoint, params, callback);
+    this.delete = async function(endpoint, params) {
+        return await sendRequest('delete', endpoint, params);
     };
 
     // private validator function