diff --git a/doc/requirements.txt b/doc/requirements.txt
index b03ff2c..3a1bb3d 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -6,3 +6,4 @@
 openstackdocstheme>=1.20.0 # Apache-2.0
 reno>=2.5.0 # Apache-2.0
 sphinxcontrib-apidoc>=0.2.0  # BSD
+sphinxcontrib-svg2pdfconverter>=0.1.0 # BSD