diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 992659f3..810c04b4 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -31,6 +31,6 @@ sphinx:
 # Optional but recommended, declare the Python requirements required
 # to build your documentation
 # See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
-# python:
-#    install:
-#    - requirements: docs/requirements.txt
+python:
+  install:
+    - requirements: docs/source/requirements.txt
diff --git a/docs/source/requirements.txt b/docs/source/requirements.txt
new file mode 100644
index 00000000..6c5d5d44
--- /dev/null
+++ b/docs/source/requirements.txt
@@ -0,0 +1 @@
+sphinx-rtd-theme