diff --git a/test-requirements.txt b/test-requirements.txt
index 54124416c..a551a382f 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -19,7 +19,7 @@ testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT
 
 # Documentation
-os-api-ref>=0.1.0 # Apache-2.0
+os-api-ref>=0.4.0 # Apache-2.0
 oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
 sphinx!=1.3b1,<1.3,>=1.2.1 # BSD
 reno>=1.8.0 # Apache2