diff --git a/docs/examples/regridding-vertical.ipynb b/docs/examples/regridding-vertical.ipynb
index c6e95976..b06326a4 100644
--- a/docs/examples/regridding-vertical.ipynb
+++ b/docs/examples/regridding-vertical.ipynb
@@ -3161,7 +3161,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.12.7"
+   "version": "undefined.undefined.undefined"
   }
  },
  "nbformat": 4,