diff --git a/docs/docs/mapping/customizing_openapi_output.md b/docs/docs/mapping/customizing_openapi_output.md
index 865c0f01b22..259a9b55f03 100644
--- a/docs/docs/mapping/customizing_openapi_output.md
+++ b/docs/docs/mapping/customizing_openapi_output.md
@@ -283,7 +283,6 @@ Output json:
     ]
 },
 ```
-{% endraw %}
 
 ### Hiding fields, methods, services and enum values
 
@@ -317,7 +316,7 @@ Note: Annotations are only supported on Services, Methods, Fields and Enum Value
 `opt: visibility_restriction_selectors=PREVIEW` will result in:
 
 Input Example:
-```proto3
+```protobuf
 service Echo {
     rpc EchoInternal(VisibilityRuleSimpleMessage) returns (VisibilityRuleSimpleMessage) {
         option (google.api.method_visibility).restriction = "INTERNAL";