diff --git a/tuic-client/README.md b/tuic-client/README.md
index d537c85..e46bd23 100644
--- a/tuic-client/README.md
+++ b/tuic-client/README.md
@@ -29,7 +29,7 @@ tuic-client -c PATH/TO/CONFIG
 
 ## Configuration
 
-```
+```json5
 {
     // Settings for the outbound TUIC proxy
     "relay": {
diff --git a/tuic-server/README.md b/tuic-server/README.md
index cd3176d..859792d 100644
--- a/tuic-server/README.md
+++ b/tuic-server/README.md
@@ -29,7 +29,7 @@ tuic-server -c PATH/TO/CONFIG
 
 ## Configuration
 
-```
+```json5
 {
     // The socket address to listen on
     "server": "[::]:443",