diff --git a/src/main/java/com/github/monkeywie/proxyee/server/auth/BasicHttpProxyAuthenticationProvider.java b/src/main/java/com/github/monkeywie/proxyee/server/auth/BasicHttpProxyAuthenticationProvider.java
index 539f83e..33a85bc 100644
--- a/src/main/java/com/github/monkeywie/proxyee/server/auth/BasicHttpProxyAuthenticationProvider.java
+++ b/src/main/java/com/github/monkeywie/proxyee/server/auth/BasicHttpProxyAuthenticationProvider.java
@@ -31,7 +31,9 @@ public BasicHttpToken authenticate(String authorization) {
             String token = authorization.substring(AUTH_TYPE_BASIC.length() + 1);
             String decode = new String(Base64.getDecoder().decode(token));
             String[] arr = decode.split(":");
-            usr = arr[0];
+            if (arr.length >= 1) {
+                usr = arr[0];
+            }
             if (arr.length >= 2) {
                 pwd = arr[1];
             }