diff --git a/.readthedocs.yml b/.readthedocs.yml
new file mode 100644
index 0000000..cfe579f
--- /dev/null
+++ b/.readthedocs.yml
@@ -0,0 +1,15 @@
+# .readthedocs.yml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Optionally set the version of Python and requirements required to build your docs
+python:
+  version: 3.8
+  install:
+    - method: pip
+      path: .
+      extra_requirements:
+        - docs
diff --git a/setup.cfg b/setup.cfg
index 25304c2..3aac550 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -18,6 +18,9 @@ install_requires =
     numpy
     scipy
 
+[options.extras_require]
+docs = sphinx>2.0.0
+
 [pycodestyle]
 # E203: Whitespace before ':'
 # W503: Line break before binary operator