diff --git a/tuic-client/README.md b/tuic-client/README.md
index 49345a2..1b69c74 100644
--- a/tuic-client/README.md
+++ b/tuic-client/README.md
@@ -23,7 +23,7 @@ tuic-client -c PATH/TO/CONFIG
 
 ## Configuration
 
-```json
+```
 {
     // Settings for the outbound TUIC proxy
     "relay": {
diff --git a/tuic-server/README.md b/tuic-server/README.md
index 5e6a1e3..14bb360 100644
--- a/tuic-server/README.md
+++ b/tuic-server/README.md
@@ -23,7 +23,7 @@ tuic-server -c PATH/TO/CONFIG
 
 ## Configuration
 
-```json
+```
 {
     // The socket address to listen on
     "server": "[::]:443",