diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index fdf5d40..afa2dab 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -9,7 +9,7 @@ version: 2
 build:
   os: ubuntu-lts-latest
   tools:
-    python: "3"
+    python: "3.8"
   jobs:
     post_install:
       - bash docs/source/fix-psutil-docstring.sh