diff --git a/api-ref/source/conf.py b/api-ref/source/conf.py
index fb197ec..a69bee6 100644
--- a/api-ref/source/conf.py
+++ b/api-ref/source/conf.py
@@ -79,8 +79,6 @@ add_module_names = False
 # output. They are ignored by default.
 show_authors = False
 
-# The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'native'
 
 # -- Options for man page output ----------------------------------------------
 
diff --git a/umn/source/conf.py b/umn/source/conf.py
index 790a1d3..82bf0bd 100644
--- a/umn/source/conf.py
+++ b/umn/source/conf.py
@@ -70,8 +70,6 @@ copyright = u'2022-present, Open Telekom Cloud'
 # output. They are ignored by default.
 show_authors = False
 
-# The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'native'
 
 # -- Options for man page output ----------------------------------------------