diff --git a/.readthedocs.yml b/.readthedocs.yml
index 14dbde9c..a80b75d1 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -1,5 +1,27 @@
-requirements_file:
-    docs/requirements.txt
+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-20.04
+  tools:
+    python: "3.9"
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+   configuration: docs/conf.py
+
+# If using Sphinx, optionally build your docs in additional formats such as PDF
+formats:
+   - pdf
+
+# Optionally declare the Python requirements required to build your docs
 python:
-    setup_py_install: true
-    version: 3.7
+  install:
+    - requirements: docs/requirements.txt
+    - method: pip
+      path: .