diff --git a/.readthedocs.yaml b/.readthedocs.yaml
new file mode 100644
index 000000000..963f56f26
--- /dev/null
+++ b/.readthedocs.yaml
@@ -0,0 +1,12 @@
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+version: 2
+
+python:
+  version: 3.8
+  install:
+    - method: pip
+      path: .
+      extra_requirements:
+        - docs
diff --git a/chaco/__init__.py b/chaco/__init__.py
index 217ed0dc0..4e09e98a9 100644
--- a/chaco/__init__.py
+++ b/chaco/__init__.py
@@ -15,5 +15,6 @@
 
 
 __extras_require__ = {
+    "docs": ["enthought-sphinx-theme", "sphinx"],
     'examples': ['encore', 'scipy', 'pandas']
 }