diff --git a/README.md b/README.md
index 3f10bdef..fff6d73c 100644
--- a/README.md
+++ b/README.md
@@ -56,7 +56,6 @@ This client has the following external dependencies:
 **Minimum:**
 *   docusign-esign
 *   Axios v1.6.8+
-*   @devhigley/parse-proxy v1.0.3+
 *   Csv-stringify v1.0.0+
 *   Jsonwebtoken v9.0.0+
 *   Passport-oauth2 v1.6.1+
diff --git a/package.json b/package.json
index 2f3ca40e..86c46dba 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,6 @@
   },
   "dependencies": {    
     "axios": "^1.6.8",
-    "@devhigley/parse-proxy":"^1.0.3",        
     "csv-stringify": "^1.0.0",
     "jsonwebtoken": "^9.0.0",    
     "passport-oauth2": "^1.6.1",    
diff --git a/src/ApiClient.js b/src/ApiClient.js
index 1e4372cd..d55729e2 100644
--- a/src/ApiClient.js
+++ b/src/ApiClient.js
@@ -12,23 +12,43 @@
   if (typeof define === "function" && define.amd) {
     // AMD. Register as an anonymous module.
     define(["axios"], factory);
-    define(["@devhigley/parse-proxy"], factory);
-  } else if (typeof module === "object" && module.exports) {    
+  } else if (typeof module === "object" && module.exports) {
     // CommonJS-like environments that support module.exports, like Node.
     module.exports = factory(
-      require("axios"),
-      require("@devhigley/parse-proxy")
+      require("axios")
     );
   } else {
     // Browser globals (root is window)
     if (!root.Docusign) {
       root.Docusign = {};
     }
-    root.Docusign.ApiClient = factory(root.axios, root.parseProxy, opts);
+    root.Docusign.ApiClient = factory(root.axios, opts);
   }
-})(this, function (axios, parseProxy, opts) {
+})(this, function (axios, opts) {
   "use strict";
 
+  var DEFAULT_PROXY_PORTS = { "http:": 80, "https:": 443 };
+  var parseProxy = function (proxyUri) {
+    var input = /:\/\//.test(proxyUri) ? proxyUri : "http://" + proxyUri;
+    var parsed = new URL(input);
+    // URL strips the default port for the scheme (e.g. http://x:80 -> port "").
+    // Restore it from the protocol so axios receives an explicit port.
+    var proxyConfig = {
+      host: parsed.hostname,
+      port: parsed.port
+        ? parseInt(parsed.port, 10)
+        : DEFAULT_PROXY_PORTS[parsed.protocol],
+      protocol: parsed.protocol.replace(":", ""),
+    };
+    if (parsed.username || parsed.password) {
+      proxyConfig.auth = {
+        username: decodeURIComponent(parsed.username),
+        password: decodeURIComponent(parsed.password),
+      };
+    }
+    return proxyConfig;
+  };
+
   /**
     * The default HTTP headers to be included for all API calls.
     * @type {Array.<String>}
@@ -105,8 +125,7 @@
     };
 
     if (proxy) {
-      const proxyObj = parseProxy(proxy);
-      requestConfig.proxy = proxyObj[0];
+      requestConfig.proxy = parseProxy(proxy);
     }
 
     const oauthRequest = axios.request(requestConfig);
@@ -608,8 +627,7 @@
     };
 
     if (this.proxy) {
-      const proxyObj = parseProxy(this.proxy);
-      requestConfig.proxy = proxyObj[0];
+      requestConfig.proxy = parseProxy(this.proxy);
     }
 
     var _formParams = this.normalizeParams(formParams);
@@ -977,8 +995,7 @@
       headers: headers,
     };
     if (this.proxy) {
-      const proxyObj = parseProxy(this.proxy);
-      requestConfig.proxy = proxyObj[0];
+      requestConfig.proxy = parseProxy(this.proxy);
     }
 
     const request = axios.request(requestConfig);