diff --git a/docs/conf.py b/docs/conf.py
index 433d185..f65d1fa 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -24,3 +24,6 @@
         ],
     )
 }
+
+# Be strict about any broken references:
+nitpicky = True
diff --git a/tox.ini b/tox.ini
index a9a50b0..6984890 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,7 +19,7 @@ extras =
 	testing
 changedir = docs
 commands =
-	python -m sphinx . {toxinidir}/build/html
+	python -m sphinx -W --keep-going . {toxinidir}/build/html
 
 [testenv:release]
 skip_install = True