diff --git a/openstack-firstapp/doc/source/conf.py b/openstack-firstapp/doc/source/conf.py
index e0dcfa715..83584418c 100644
--- a/openstack-firstapp/doc/source/conf.py
+++ b/openstack-firstapp/doc/source/conf.py
@@ -33,7 +33,6 @@ import openstackdocstheme
 extensions = [
     'sphinx.ext.todo',
     'sphinx.ext.ifconfig',
-    'sphinxcontrib.blockdiag',
     'sphinxcontrib.nwdiag',
     'sphinx.ext.graphviz',
     'sphinx.ext.todo'
diff --git a/test-requirements.txt b/test-requirements.txt
index 717f748be..a09e7f79a 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -8,6 +8,4 @@ Pygments
 sphinx>=1.1.2,!=1.2.0,!=1.3b1,<1.3
 openstackdocstheme>=1.0.7
 nwdiag
-blockdiag
-sphinxcontrib-blockdiag
 sphinxcontrib-nwdiag