diff --git a/otc_metadata/templates/tox.ini.j2 b/otc_metadata/templates/tox.ini.j2
index 7cabef17..1e2e21a0 100644
--- a/otc_metadata/templates/tox.ini.j2
+++ b/otc_metadata/templates/tox.ini.j2
@@ -28,6 +28,7 @@ commands = {posargs}
 [testenv:docs]
 deps =
   -r{toxinidir}/doc/requirements.txt
+  -c https://raw.githubusercontent.com/opentelekomcloud-docs/docs-constraints/main/constraints.txt
 allowlist_externals =
   mkdir
   cp