diff --git a/doc/source/conf.py b/doc/source/conf.py
index 52c0ab9..f95f625 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -95,6 +95,9 @@ pygments_style = 'sphinx'
 # A list of ignored prefixes for module index sorting.
 modindex_common_prefix = ['docs-specs.']
 
+# Do not warn about non-local image URI
+suppress_warnings = ['image.nonlocal_uri']
+
 # -- Options for man page output ----------------------------------------------
 man_pages = []
 
diff --git a/setup.cfg b/setup.cfg
index d0d7cb7..dbc9194 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -21,9 +21,7 @@ classifier =
 all_files = 1
 build-dir = doc/build
 source-dir = doc/source
-
-[pbr]
-warnerrors = True
+warning-is-error = 1
 
 [wheel]
 universal = 1