diff --git a/fastchat/serve/huggingface_api_worker.py b/fastchat/serve/huggingface_api_worker.py
index 7eef50e47..2d0611fe5 100644
--- a/fastchat/serve/huggingface_api_worker.py
+++ b/fastchat/serve/huggingface_api_worker.py
@@ -19,6 +19,7 @@
 import asyncio
 import json
 import uuid
+import os
 from typing import List, Optional
 
 import requests
@@ -300,6 +301,13 @@ def create_huggingface_api_worker():
         default=None,
         help="Overwrite the random seed for each generation.",
     )
+    parser.add_argument(
+        "--ssl",
+        action="store_true",
+        required=False,
+        default=False,
+        help="Enable SSL. Requires OS Environment variables 'SSL_KEYFILE' and 'SSL_CERTFILE'.",
+    )
     args = parser.parse_args()
 
     with open(args.model_info_file, "r", encoding="UTF-8") as f:
@@ -388,4 +396,14 @@ def create_huggingface_api_worker():
 
 if __name__ == "__main__":
     args, workers = create_huggingface_api_worker()
-    uvicorn.run(app, host=args.host, port=args.port, log_level="info")
+    if args.ssl:
+        uvicorn.run(
+            app,
+            host=args.host,
+            port=args.port,
+            log_level="info",
+            ssl_keyfile=os.environ["SSL_KEYFILE"],
+            ssl_certfile=os.environ["SSL_CERTFILE"],
+        )
+    else:
+        uvicorn.run(app, host=args.host, port=args.port, log_level="info")
diff --git a/fastchat/serve/model_worker.py b/fastchat/serve/model_worker.py
index c18f0aa9e..d69c8cd14 100644
--- a/fastchat/serve/model_worker.py
+++ b/fastchat/serve/model_worker.py
@@ -291,6 +291,13 @@ def create_model_worker():
     parser.add_argument(
         "--debug", type=bool, default=False, help="Print debugging messages"
     )
+    parser.add_argument(
+        "--ssl",
+        action="store_true",
+        required=False,
+        default=False,
+        help="Enable SSL. Requires OS Environment variables 'SSL_KEYFILE' and 'SSL_CERTFILE'.",
+    )
     args = parser.parse_args()
     logger.info(f"args: {args}")
 
@@ -359,4 +366,14 @@ def create_model_worker():
 
 if __name__ == "__main__":
     args, worker = create_model_worker()
-    uvicorn.run(app, host=args.host, port=args.port, log_level="info")
+    if args.ssl:
+        uvicorn.run(
+            app,
+            host=args.host,
+            port=args.port,
+            log_level="info",
+            ssl_keyfile=os.environ["SSL_KEYFILE"],
+            ssl_certfile=os.environ["SSL_CERTFILE"],
+        )
+    else:
+        uvicorn.run(app, host=args.host, port=args.port, log_level="info")
diff --git a/fastchat/serve/multi_model_worker.py b/fastchat/serve/multi_model_worker.py
index f77ff4447..aafb7fbb8 100644
--- a/fastchat/serve/multi_model_worker.py
+++ b/fastchat/serve/multi_model_worker.py
@@ -190,6 +190,13 @@ def create_multi_model_worker():
     parser.add_argument("--limit-worker-concurrency", type=int, default=5)
     parser.add_argument("--stream-interval", type=int, default=2)
     parser.add_argument("--no-register", action="store_true")
+    parser.add_argument(
+        "--ssl",
+        action="store_true",
+        required=False,
+        default=False,
+        help="Enable SSL. Requires OS Environment variables 'SSL_KEYFILE' and 'SSL_CERTFILE'.",
+    )
     args = parser.parse_args()
     logger.info(f"args: {args}")
 
@@ -279,4 +286,14 @@ def create_multi_model_worker():
 
 if __name__ == "__main__":
     args, workers = create_multi_model_worker()
-    uvicorn.run(app, host=args.host, port=args.port, log_level="info")
+    if args.ssl:
+        uvicorn.run(
+            app,
+            host=args.host,
+            port=args.port,
+            log_level="info",
+            ssl_keyfile=os.environ["SSL_KEYFILE"],
+            ssl_certfile=os.environ["SSL_CERTFILE"],
+        )
+    else:
+        uvicorn.run(app, host=args.host, port=args.port, log_level="info")