diff --git a/modules/docusaurus-website/src/get-default-config.ts b/modules/docusaurus-website/src/get-default-config.ts
index b93cc9d..a241b1e 100644
--- a/modules/docusaurus-website/src/get-default-config.ts
+++ b/modules/docusaurus-website/src/get-default-config.ts
@@ -178,8 +178,7 @@ export function getDocusaurusConfig(config: OcularWebsiteConfig): Config {
               modules: [resolve('node_modules'), resolve(rootDir, 'node_modules')],
               alias: getAliases(rootDir)
             },
-            // @ts-expect-error undefined property
-            webpackConfig.resolve
+            (webpackConfig as {resolve?: object}).resolve ?? {}
           )
         }
       ],
diff --git a/modules/docusaurus-website/test/get-default-config.spec.ts b/modules/docusaurus-website/test/get-default-config.spec.ts
new file mode 100644
index 0000000..819bac0
--- /dev/null
+++ b/modules/docusaurus-website/test/get-default-config.spec.ts
@@ -0,0 +1,13 @@
+import {expect, test} from 'vitest';
+import {getDocusaurusConfig} from '../src/get-default-config.js';
+
+test('getDocusaurusConfig supports omitted webpackConfig', () => {
+  expect(() =>
+    getDocusaurusConfig({
+      projectName: 'test-project',
+      repoUrl: 'https://github.com/visgl/test-project',
+      siteUrl: 'https://example.com',
+      docsTableOfContents: []
+    })
+  ).not.toThrow();
+});