diff --git a/doc/source/conf.py b/doc/source/conf.py
index df07273..8153904 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -14,7 +14,7 @@ release = '1.0'
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
 
-extensions = ['myst_parser', 'sphinx_markdown_builder', 'sphinx_rtd_dark_mode']
+extensions = ['sphinx_rtd_dark_mode', 'sphinx_copybutton']
 
 templates_path = ['_templates']
 exclude_patterns = ['_build']
diff --git a/doc/source/requirements.txt b/doc/source/requirements.txt
index ba97ce7..9cf9e95 100644
--- a/doc/source/requirements.txt
+++ b/doc/source/requirements.txt
@@ -1,5 +1,6 @@
 sphinx
 sphinx-rtd-theme
 sphinx-rtd-dark-mode
-myst-parser
-sphinx_markdown_builder
+
+# Adds a 'copy' button to the right of codeblocks.
+sphinx-copybutton