diff --git a/conf.py b/conf.py
index e1bde42572..d8f86c7aee 100644
--- a/conf.py
+++ b/conf.py
@@ -282,6 +282,9 @@ def get_version():
 # The name of the Pygments (syntax highlighting) style to use.
 pygments_style = 'sphinx'
 
+# The default language to highlight source code in.
+highlight_language = 'none'
+
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = False