diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 0000000..e140bc0
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,10 @@
+pbr>=2.0.0,!=2.1.0
+
+Pygments
+docutils
+sphinx>=1.6.2
+openstackdocstheme>=1.11.0
+nwdiag
+blockdiag
+sphinxcontrib-blockdiag
+sphinxcontrib-nwdiag
diff --git a/tox.ini b/tox.ini
index 46b15f4..74436b0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,16 +34,7 @@
          -print0 | xargs -0 bashate -v -iE006 -eE005,E042"
 
 [testenv:docs]
-deps =
-   Pygments
-   docutils
-   sphinx>=1.6.2
-   pbr>=2.0.0,!=2.1.0
-   openstackdocstheme>=1.11.0
-   nwdiag
-   blockdiag
-   sphinxcontrib-blockdiag
-   sphinxcontrib-nwdiag
+deps = -r{toxinidir}/doc/requirements.txt
 whitelist_externals = bash
 setenv =
   TOP_DIR={toxinidir}
@@ -51,11 +42,5 @@
   python setup.py build_sphinx
 
 [testenv:venv]
-deps =
-   pbr>=2.0.0,!=2.1.0
-   sphinx>=1.6.2
-   openstackdocstheme>=1.11.0
-   blockdiag
-   sphinxcontrib-blockdiag
-   sphinxcontrib-nwdiag
+deps = -r{toxinidir}/doc/requirements.txt
 commands = {posargs}