diff --git a/docs/rtd-pip-requirements.txt b/docs/rtd-pip-requirements.txt
index a85739e..7589142 100644
--- a/docs/rtd-pip-requirements.txt
+++ b/docs/rtd-pip-requirements.txt
@@ -1,2 +1,8 @@
 setuptools
 numpy
+numpydoc
+sphinx
+sphinx-automodapi
+sphinx-rtd-theme
+stsci-rtd-theme
+graphviz
diff --git a/setup.py b/setup.py
index 978bc25..12f6614 100755
--- a/setup.py
+++ b/setup.py
@@ -63,9 +63,9 @@
 DOCS_REQUIRE = [
     'numpydoc',
     'graphviz',
-    'sphinx<=1.8.5',
-    'sphinx_rtd_theme',
-    'stsci_rtd_theme',
+    'sphinx',
+    'sphinx-rtd-theme',
+    'stsci-rtd-theme',
     'sphinx_automodapi',
 ]