diff --git a/doc/requirements.txt b/doc/requirements.txt
index 2d070e19eb0..37c0998ce16 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -6,3 +6,6 @@ sphinx_feature_classification>=1.0.0 # Apache-2.0
 openstackdocstheme>=1.30.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
 reno>=2.5.0 # Apache-2.0
+# NOTE(ralonsoh): pyroute2 module should be installed and the version limited
+# according to upper-constraints.txt
+pyroute2>=0.5.7;sys_platform!='win32' # Apache-2.0 (+ dual licensed GPL2)