diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 30d9b7b..4c58e28 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -8,14 +8,15 @@ version: 2
 build:
   os: ubuntu-24.04
   tools:
-    python: "3.13"
+    python: "mambaforge-latest"
 
   # custom build process
   # https://docs.readthedocs.io/en/stable/build-customization.html#install-dependencies-with-uv
   commands:
-    # dependencies
-    - pip install -r requirements.txt
     # build
     - myst build --html
     # deploy
     - mv _build/html $READTHEDOCS_OUTPUT/html
+
+conda:
+  environment: conda.yml
diff --git a/conda.yml b/conda.yml
new file mode 100644
index 0000000..63faf5c
--- /dev/null
+++ b/conda.yml
@@ -0,0 +1,9 @@
+name: readthedocs
+
+channels:
+  - conda-forge
+  - nodefaults
+
+dependencies:
+  - python
+  - mystmd
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index fb187da..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1 +0,0 @@
-mystmd