diff --git a/.readthedocs.yml b/.readthedocs.yml
index 611695db..57297d4b 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -1,7 +1,11 @@
 version: 2
 
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.8"
+
 python:
-  version: "3.8"
   install:
       - method: pip
         path: .
diff --git a/pyproject.toml b/pyproject.toml
index 46cbc762..89e738c0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,6 +54,7 @@ rtd = [
     "sphinx-design",
     "sphinx_book_theme",
     "jupyter_sphinx",
+    "ipykernel",
 ]
 testing = [
     "coverage",