diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 50699482..d39ecb1a 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -30,7 +30,7 @@ jobs:
         with:
           path: _build
           # NOTE: change key to "jupyterbook-DATE" to force rebuilding cache
-          key: jupyterbook-20230602
+          key: jupyterbook-20230626
 
       - name: Install Conda environment with Micromamba
         uses: mamba-org/setup-micromamba@v1
diff --git a/_config.yml b/_config.yml
index 96904b30..3e3e184c 100644
--- a/_config.yml
+++ b/_config.yml
@@ -1,7 +1,7 @@
 # Learn more at https://jupyterbook.org/customize/config.html
 title: ''
 author: The Xarray Community
-copyright: '2022'
+copyright: '2023'
 logo: images/logo.png
 only_build_toc_files: true