diff --git a/.readthedocs.yml b/.readthedocs.yml
new file mode 100644
index 0000000..ffa84c4
--- /dev/null
+++ b/.readthedocs.yml
@@ -0,0 +1,7 @@
+# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+python:
+    version: 3
+requirements_file: requirements.txt