diff --git a/docs/config.rst b/docs/config.rst
index 3bc1a5a..45a8899 100644
--- a/docs/config.rst
+++ b/docs/config.rst
@@ -4,7 +4,9 @@ Configuration file
 
 The configuration file defines the behavior of the application. It's a regular JSON file.
 
-Example::
+Example:
+
+.. code-block:: json
 
   {
     "options": {