diff --git a/README.rst b/README.rst
index 70d19d7..291aeae 100644
--- a/README.rst
+++ b/README.rst
@@ -241,7 +241,7 @@
 
 Nginx stats server (required by collectd nginx plugin)
 
-.. code-block::
+.. code-block:: yaml
 
     nginx:
       server: