diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 5d30f0a..f069e2d 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -12,4 +12,4 @@ sphinx:
 python:
   install:
     - method: pip
-      path: .
\ No newline at end of file
+      path: ".[docs]"
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 2cf300a..2f6ba6a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,6 +29,12 @@ test = [
     "pytest",
     "cloudpickle",
 ]
+docs = [
+    "sphinx>=4.0.0",
+    "numpydoc",
+    "pytest",
+    "cloudpickle",
+]
 
 [tool.setuptools]
 packages = ["donfig"]