diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 0704269..da1805b 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -31,7 +31,7 @@ jobs:
           ref: ${{ env.BRANCH }}
 
       - name: Run Zola
-        uses: shalzz/zola-deploy-action@v0.19.2
+        uses: shalzz/zola-deploy-action@v0.22.1
         env:
           BUILD_ONLY: true
 
diff --git a/config.toml b/config.toml
index 776142b..4d11da0 100644
--- a/config.toml
+++ b/config.toml
@@ -24,10 +24,12 @@ include_path = true
 # Whether to include the rendered content of the page/section in the index
 include_content = true
 
-[markdown]
-# Whether to do syntax highlighting
-# Theme can be customised by setting the `highlight_theme` variable to a theme supported by Zola
-highlight_code = true
+[markdown.highlighting]
+# Theme can be customised by setting the `theme` variable to a theme supported by Zola
+theme = "slack-dark"
+
+# Whether to error when a theme is missing highlights for a specific language
+error_on_missing_language = true
 
 [extra]
 version_choices = "/docs/data.json"