diff --git a/docs/conf.py b/docs/conf.py
index 5c645ffbda1e6693f57f5139c320ee095cfff8d8..585123d7f895c3ff705717354fa2694e4edae5ed 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -72,9 +72,9 @@ author = 'caner & inso'
 # built documents.
 #
 # The short X.Y version.
-version = '0.30.5'
+version = '0.51.0'
 # The full version, including alpha/beta/rc tags.
-release = '0.30.5'
+release = '0.51.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -126,6 +126,7 @@ todo_include_todos = True
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #html_theme = 'alabaster'
+html_theme = 'sphinx_rtd_theme'
 
 # 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/requirements_dev.txt b/requirements_dev.txt
index ff19235a2d226ff1f3ef99d4b5751381ae2673ac..5816b58ffe5061bef5e60cef8f520692e43a12ca 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,2 +1,3 @@
-sphinx
 mypy
+sphinx
+sphinx_rtd_theme