diff --git a/optimade.rst b/optimade.rst
index 3295671d..f9257c60 100644
--- a/optimade.rst
+++ b/optimade.rst
@@ -4541,7 +4541,7 @@ This leaves the following overall file structure:
 Example OPTIMADE JSON Lines File
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-.. code:jsonc
+.. code:: jsonc
     {"x-optimade": {"api_version": "1.2.0"}}
     {"meta": {"time_stamp": "2024-07-19T11:47:10Z", "data_returned": 6, "provider": {"name": "Example JSONL", "description": "An example JSONL file.", "prefix": "_exmpl"}}}
     {"type": "info", "id": "/", "attributes": {"api_version": "1.2.0", "available_api_versions": ["1.2.0"], "formats": ["json"], "entry_types_by_format": {"json": ["references", "structures"]}, "license": "https://example.com/licenses/example_license.html"} "homepage": "https://example.com", "name": "Example API", "provider": {"description": "A simple example provider", "name": "Example Provider"}}}