diff --git a/.readthedocs.yml b/.readthedocs.yaml
similarity index 52%
rename from .readthedocs.yml
rename to .readthedocs.yaml
index c72bd78..fcb98ac 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yaml
@@ -2,20 +2,28 @@
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 version: 2
 
+# Build documentation in the docs/ directory with Sphinx
 sphinx:
   builder: html
   configuration: docs/conf.py
   fail_on_warning: true
 
-# Set the version of Python and requirements required to build your docs
+# Optionally build your docs in additional formats such as PDF and ePub
+formats:
+  - htmlzip
+  - pdf
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: mambaforge-4.10
+
+conda:
+  environment: docs/rtd_environment.yaml
+
 python:
-  version: 3.8
-  system_packages: true
   install:
     - method: pip
       path: .
       extra_requirements:
         - docs
-
-# Don't build any extra formats
-formats: []
diff --git a/docs/rtd_environment.yaml b/docs/rtd_environment.yaml
new file mode 100644
index 0000000..aeebc4d
--- /dev/null
+++ b/docs/rtd_environment.yaml
@@ -0,0 +1,9 @@
+name: rtd311
+channels:
+ - conda-forge
+ - defaults
+dependencies:
+ - python=3.11
+ - pip
+ - graphviz
+ - sphinx_rtd_theme>1.2.0