diff --git a/python/sglang/srt/server_args.py b/python/sglang/srt/server_args.py
index bf20a196b..409065177 100644
--- a/python/sglang/srt/server_args.py
+++ b/python/sglang/srt/server_args.py
@@ -21,7 +21,7 @@ import logging
 import random
 from typing import List, Optional, Union
 
-from sglang.srt.utils import is_hip
+from sglang.srt.utils import is_hip, is_ipv6
 
 logger = logging.getLogger(__name__)
 
@@ -570,7 +570,10 @@ class ServerArgs:
         return cls(**{attr: getattr(args, attr) for attr in attrs})
 
     def url(self):
-        return f"http://{self.host}:{self.port}"
+        if is_ipv6(self.host):
+            return f"http://[{self.host}]:{self.port}"
+        else:
+            return f"http://{self.host}:{self.port}"
 
     def check_server_args(self):
         assert (
diff --git a/python/sglang/srt/utils.py b/python/sglang/srt/utils.py
index 702d6f980..1a08463b5 100644
--- a/python/sglang/srt/utils.py
+++ b/python/sglang/srt/utils.py
@@ -16,6 +16,7 @@ limitations under the License.
 """Common utilities."""
 
 import base64
+import ipaddress
 import logging
 import os
 import pickle
@@ -54,6 +55,14 @@ def is_hip() -> bool:
     return torch.version.hip is not None
 
 
+def is_ipv6(address):
+    try:
+        ipaddress.IPv6Address(address)
+        return True
+    except ipaddress.AddressValueError:
+        return False
+
+
 def enable_show_time_cost():
     global show_time_cost
     show_time_cost = True