diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 3378211..1309cab 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -5,16 +5,14 @@
 # Required
 version: 2
 
-# Build documentation in the docs/ directory with Sphinx
+build:
+  os: ubuntu-20.04
+  tools:
+    python: '3.10'
+
 sphinx:
    configuration: docs/conf.py
 
-# Optionally set the version of Python and requirements required to build your docs
 python:
-   version: '3.8'
    install:
    - requirements: requirements.docs.txt
-
-build:
-  apt_packages:
-    - vapoursynth
diff --git a/docs/conf.py b/docs/conf.py
index 486c142..05652e7 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -27,6 +27,7 @@
     'python': ('https://docs.python.org/3', None),
     'vapoursynth': ('http://www.vapoursynth.com/doc', None)
 }
+autodoc_mock_imports = ['vapoursynth']
 
 
 # -- Options for HTML output -------------------------------------------------
diff --git a/requirements.docs.txt b/requirements.docs.txt
index cb302fe..0630dc8 100644
--- a/requirements.docs.txt
+++ b/requirements.docs.txt
@@ -1,2 +1 @@
 Sphinx==4.4.0
-VapourSynth==57