diff --git a/doc/conf.py b/doc/conf.py
index 94f11238363013305ee6a3cd669138f300004a10..8290eb84beb762ca55597e7169b7726b2225d073 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -129,7 +129,7 @@ extensions = [
     'sphinx.ext.todo',
     'sphinx.ext.coverage',
     'sphinx.ext.imgmath',
-    'sphinx.ext.viewcode',
+    #  'sphinx.ext.viewcode',
     'sphinx.ext.inheritance_diagram',
     'sphinxcontrib.plantuml',
 ]