diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 311ebce..b810e84 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,7 +13,7 @@ jobs:
 
       - uses: actions/setup-node@v1
         with:
-          node-version: "14.x"
+          node-version: "20.x"
       - name: Format
         run: |
           npm ci
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 07ca5a0..ee7dbdf 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,7 +8,7 @@ jobs:
 
       - uses: actions/setup-node@v1
         with:
-          node-version: "14.x"
+          node-version: "20.x"
 
       - name: Run tests
         run: |
diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 0000000..6de89a8
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1 @@
+nodejs 20.0.0
diff --git a/demo/vite-ts-demo/README.md b/demo/vite-ts-demo/README.md
index e6cd94f..a45e2a0 100644
--- a/demo/vite-ts-demo/README.md
+++ b/demo/vite-ts-demo/README.md
@@ -42,6 +42,6 @@ If you have state that's important to retain within a component, consider creati
 ```ts
 // store.ts
 // An extremely simple external store
-import { writable } from 'svelte/store'
-export default writable(0)
+import { writable } from "svelte/store";
+export default writable(0);
 ```
diff --git a/demo/vite-ts-demo/svelte.config.js b/demo/vite-ts-demo/svelte.config.js
index b0683fd..de2ddd6 100644
--- a/demo/vite-ts-demo/svelte.config.js
+++ b/demo/vite-ts-demo/svelte.config.js
@@ -1,7 +1,7 @@
-import { vitePreprocess } from '@sveltejs/vite-plugin-svelte'
+import { vitePreprocess } from "@sveltejs/vite-plugin-svelte";
 
 export default {
   // Consult https://svelte.dev/docs#compile-time-svelte-preprocess
   // for more information about preprocessors
   preprocess: vitePreprocess(),
-}
+};
diff --git a/demo/vite-ts-demo/vite.config.ts b/demo/vite-ts-demo/vite.config.ts
index d701969..5ac8ecf 100644
--- a/demo/vite-ts-demo/vite.config.ts
+++ b/demo/vite-ts-demo/vite.config.ts
@@ -1,7 +1,7 @@
-import { defineConfig } from 'vite'
-import { svelte } from '@sveltejs/vite-plugin-svelte'
+import { defineConfig } from "vite";
+import { svelte } from "@sveltejs/vite-plugin-svelte";
 
 // https://vitejs.dev/config/
 export default defineConfig({
   plugins: [svelte()],
-})
+});