diff --git a/.github/workflows/deploy-demo.yml b/.github/workflows/deploy-demo.yml
index 5b40f13..1e77d0a 100644
--- a/.github/workflows/deploy-demo.yml
+++ b/.github/workflows/deploy-demo.yml
@@ -17,7 +17,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v1
       with:
-        python-version: 3.8
+        python-version: "3.10"
     - uses: actions/cache@v1
       name: Configure pip caching
       with:
@@ -110,7 +110,7 @@ jobs:
             --branch=main \
             --install=datasette-search-all>=0.3 \
             --install=datasette-render-markdown>=1.1.2 \
-            --install=datasette-pretty-json \
+            --install=datasette-pretty-json>=0.2.2 \
             --install=datasette-json-html \
             --install=datasette-vega \
             --install=datasette-render-images \