diff --git a/.readthedocs.yml b/.readthedocs.yml
index 372252e..845442e 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -4,7 +4,7 @@ build:
   tools:
     python: mambaforge-4.10
   commands:
-    - mamba install -c conda-forge -c nodefaults pixi==0.22.0
+    - mamba install -c conda-forge -c nodefaults pixi==0.39.0
     - pixi run readthedocs
 sphinx:
   configuration: docs/conf.py