MAINT: Indicate Sphinx dependencies

2 files changed, 7 insertions, 1 deletions

diff --git a/docs/sphinx-requirements.txt b/docs/sphinx-requirements.txt
index e69de29b..ba993cb2 100644
--- a/docs/sphinx-requirements.txt
+++ b/docs/sphinx-requirements.txt
@@ -0,0 +1,2 @@
+sphinx < 3
+sphinxcontrib-apidoc
diff --git a/setup.py b/setup.py
index 0203f299..d10513be 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,11 @@ kwargs = {}
 kwargs['install_requires'] = [ 'six', 'isodate', 'pyparsing']
 kwargs['tests_require'] = ['html5lib', 'networkx']
 kwargs['test_suite'] = "nose.collector"
-kwargs['extras_require'] = {'html': ['html5lib'], 'sparql': ['requests']}
+kwargs['extras_require'] = {
+    'html': ['html5lib'],
+    'sparql': ['requests'],
+    'docs': ['sphinx < 3', 'sphinxcontrib-apidoc']
+    }
 
 def find_version(filename):
     _version_re = re.compile(r'__version__ = "(.*)"')