diff --git a/docs/source/conf.py b/docs/source/conf.py
index 2eb75d509cc07..1129eb08a8216 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -16,7 +16,6 @@
 author = 'The PHP Group'
 extensions = [
     'sphinx_design',
-    'sphinxawesome_theme.highlighting',
 ]
 templates_path = ['_templates']
 html_theme = 'sphinxawesome_theme'