diff --git a/setup.cfg b/setup.cfg
index 58224d3..6d83736 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -44,3 +44,9 @@ input_file = security-analysis/locale/security-analysis.pot
 keywords = _ gettext ngettext l_ lazy_gettext
 mapping_file = babel.cfg
 output_file = security-analysis/locale/security-analysis.pot
+
+[pbr]
+# Treat sphinx warnings as errors during the docs build; this helps us keep
+# the documentation clean.
+warnerrors = true
+