diff --git a/README.rst b/README.rst
index 293fd7b..0a04fae 100644
--- a/README.rst
+++ b/README.rst
@@ -313,7 +313,7 @@ Install tox and run it:
 
 You should see that the tests have succeeded:
 
-.. code-block::
+.. code-block:: plaintext
 
 ======================================================================================================== 59 passed in 0.91s ========================================================================================================
 py: commands[1]> pylama dsmr_parser test