diff --git a/doc/source/conf.py b/doc/source/conf.py
index 01e1d4349..8cb3eab23 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -29,12 +29,15 @@ sys.path.insert(0, os.path.abspath('./'))
 extensions = [
     'sphinx.ext.autodoc',
     'sphinxcontrib.pecanwsme.rest',
+    'sphinxcontrib.httpdomain',
     'wsmeext.sphinxext',
     'openstackdocstheme',
 ]
 
 wsme_protocols = ['restjson']
 
+suppress_warnings = ['app.add_directive']
+
 # Add any paths that contain templates here, relative to this directory.
 # templates_path = ['_templates']
 
diff --git a/setup.cfg b/setup.cfg
index e7c7eb7ba..92a8d0ebc 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -28,6 +28,7 @@ packages =
 source-dir = doc/source
 build-dir = doc/build
 all_files = 1
+warning-is-error = 1
 
 [upload_sphinx]
 upload-dir = doc/build/html