diff --git a/doc-requirements.txt b/doc-requirements.txt
deleted file mode 100644
index 04e806d..0000000
--- a/doc-requirements.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-pip>=9.0.0
-sphinx>=1.4
-setuptools>=23.0.0
-repoze.sphinx.autointerface
-sphinx_rtd_theme
-# Include these here to work around the "TypeError: isinstance() arg 2 must
-# be a class, type, or tuple of classes and types" we get when
-# RTD installs setup.py and it gets to BTrees.
-zope.interface
-BTrees
diff --git a/docs/conf.py b/docs/conf.py
index a8694bc..9ba4305 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -130,7 +130,7 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'sphinx_rtd_theme'
+html_theme = 'default'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 128a4ee..e2831f4 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,2 @@
-Sphinx>4.3
-sphinx-rtd-theme>=1
-ZConfig
-Zope
-tempstorage
+Sphinx
+repoze.sphinx.autointerface
\ No newline at end of file