diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index d30e2e6..134ebdf 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,8 +1,8 @@
 name: Deploy Demo Site
 
-on: 
+on:
   push:
-    branches: 
+    branches:
       - master
 
 jobs:
@@ -10,11 +10,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
-    - uses: actions/setup-node@v1.1.0
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v2
+      with:
+        node-version: '12'
     - run: npm install
     - run: npm run build
     - run: npm install -g surge
     - run: surge --domain unofficial-observablehq-compiler-demo.surge.sh --project .
-      env: 
+      env:
         SURGE_TOKEN: ${{ secrets.SURGE_TOKEN }}
diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index 4be180a..407e60c 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -1,6 +1,6 @@
 name: Pull Request Demos
 
-on: 
+on:
   pull_request:
     types: [opened, reopened, synchronize]
 
@@ -9,19 +9,21 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
-    - uses: actions/setup-node@v1.1.0
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v2
+      with:
+        node-version: '12'
     - run: npm install
     - run: npm run build
     - run: npm install -g surge
     - run: surge --domain unofficial-observablehq-compiler-demo-${{ github.event.number }}.surge.sh --project .
-      env: 
+      env:
         SURGE_TOKEN: ${{ secrets.SURGE_TOKEN }}
-    - uses: actions/github-script@0.2.0
+    - uses: actions/github-script@v3
       with:
-          github-token: ${{github.token}}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
-            await github.issues.createComment({
+            github.issues.createComment({
               issue_number: context.issue.number,
               owner: context.repo.owner,
               repo: context.repo.repo,