diff --git a/docs/src/content/docs/configuration/insecure-registries.mdx b/docs/src/content/docs/configuration/insecure-registries.mdx
index 6646df7..4c385c0 100644
--- a/docs/src/content/docs/configuration/insecure-registries.mdx
+++ b/docs/src/content/docs/configuration/insecure-registries.mdx
@@ -8,7 +8,7 @@ To solve this problem, you can specify exceptions in your `cup.json`.
 
 Here's what it looks like:
 
-```json
+```jsonc
 {
   "registries": {
     "<INSECURE_REGISTRY_1>": {