diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index aee58aa..13e7014 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -5,5 +5,9 @@ build:
   tools:
     python: "3.9"
 
+python:
+   install:
+   - requirements: requirements.txt
+
 sphinx:
   configuration: conf.py
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..4d834d0
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+sphinx
+docutils<0.18