diff --git a/doc/stream-proxy.md b/doc/stream-proxy.md
index 606b9278..991fa3a0 100644
--- a/doc/stream-proxy.md
+++ b/doc/stream-proxy.md
@@ -35,10 +35,10 @@ apisix:
   stream_proxy:                 # TCP/UDP proxy
     tcp:                        # TCP proxy address list
       - 9100
-      - 127.0.0.1:9101
+      - "127.0.0.1:9101"
     udp:                        # UDP proxy address list
       - 9200
-      - 127.0.0.1:9211
+      - "127.0.0.1:9211"
 ```
 
 ## How to set route?
diff --git a/doc/zh-cn/stream-proxy.md b/doc/zh-cn/stream-proxy.md
index afb9fd29..2d9ceeac 100644
--- a/doc/zh-cn/stream-proxy.md
+++ b/doc/zh-cn/stream-proxy.md
@@ -35,10 +35,10 @@ apisix:
   stream_proxy:                 # TCP/UDP proxy
     tcp:                        # TCP proxy address list
       - 9100
-      - 127.0.0.1:9101
+      - "127.0.0.1:9101"
     udp:                        # UDP proxy address list
       - 9200
-      - 127.0.0.1:9211
+      - "127.0.0.1:9211"
 ```
 
 ## 如何设置 route ?