diff --git a/eslint.config.mjs b/eslint.config.mjs
index 0c198ee7..f38a583c 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -20,7 +20,7 @@ const compat = new FlatCompat({
 
 export default [
     {
-        ignores: ['**/dist', '**/.eslintrc.cjs', 'tailwind.config.js'],
+        ignores: ['**/dist', '**/.eslintrc.cjs', '**/tailwind.config.js'],
         // files: ['**/*.ts', '**/*.tsx'],
     },
     ...fixupConfigRules(
diff --git a/src/context/storage-context/storage-provider.tsx b/src/context/storage-context/storage-provider.tsx
index 5a0e1e0d..aebebbd0 100644
--- a/src/context/storage-context/storage-provider.tsx
+++ b/src/context/storage-context/storage-provider.tsx
@@ -134,6 +134,20 @@ export const StorageProvider: React.FC<React.PropsWithChildren> = ({
         config: '++id, defaultDiagramId',
     });
 
+    db.version(9).upgrade((tx) =>
+        tx
+            .table<DBTable & { diagramId: string }>('db_tables')
+            .toCollection()
+            .modify((table) => {
+                for (const field of table.fields) {
+                    if (typeof field.nullable === 'string') {
+                        field.nullable =
+                            (field.nullable as string).toLowerCase() === 'true';
+                    }
+                }
+            })
+    );
+
     db.on('ready', async () => {
         const config = await getConfig();
 
diff --git a/tailwind.config.js b/tailwind.config.js
index 49010889..abd7a719 100644
--- a/tailwind.config.js
+++ b/tailwind.config.js
@@ -1,4 +1,4 @@
-const defaultTheme = require('tailwindcss/defaultTheme');
+import defaultTheme from 'tailwindcss/defaultTheme';
 
 /** @type {import('tailwindcss').Config} */
 module.exports = {