diff --git a/selenium-webdriver/index.d.ts b/selenium-webdriver/index.d.ts
index 47a5045219..9d74e28b9e 100644
--- a/selenium-webdriver/index.d.ts
+++ b/selenium-webdriver/index.d.ts
@@ -2106,6 +2106,9 @@ interface ProxyConfig {
   httpProxy?: string;
   sslProxy?: string;
   noProxy?: string;
+    socksProxy?: string,
+    socksUsername?: string,
+    socksPassword?: string
 }
 
 /**