diff --git a/doc/conf.py b/doc/conf.py
index f393974609f0bb7153179f723779faa74445affd..2915444674a7c164ac6ec984563d604f26be493e 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -25,6 +25,7 @@ extensions = [
     'sphinx.ext.intersphinx',
     'sphinx.ext.napoleon',
     'sphinx.ext.viewcode',
+    'matplotlib.sphinxext.plot_directive'
     ]
 
 import sphinx