diff --git a/registry/cache/README.md b/registry/cache/README.md
index 1c2d6e90..d3221f6d 100644
--- a/registry/cache/README.md
+++ b/registry/cache/README.md
@@ -6,7 +6,7 @@ If you're looking for caching in your microservices use the [selector](https://m
 
 ## Interface
 
-```
+```go
 // Cache is the registry cache interface
 type Cache interface {
 	// embed the registry interface
@@ -18,7 +18,7 @@ type Cache interface {
 
 ## Usage
 
-```
+```go
 import (
 	"github.com/micro/go-micro/registry"
 	"github.com/micro/go-micro/registry/cache"