diff --git a/doc/source/conf.py b/doc/source/conf.py
index 16c6d12..9ae9b36 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -29,6 +29,7 @@
     "sphinx.ext.napoleon",
     "sphinx.ext.viewcode",
     "sphinx_autodoc_typehints",
+    "sphinx_copybutton",
     "sphinx_rtd_theme",
     "sphinxcontrib.programoutput",
     "sphinxcontrib.spelling",