diff --git a/packages/knip/src/plugins/typedoc/index.ts b/packages/knip/src/plugins/typedoc/index.ts
index 552bd186..6a2b2f8b 100644
--- a/packages/knip/src/plugins/typedoc/index.ts
+++ b/packages/knip/src/plugins/typedoc/index.ts
@@ -24,8 +24,14 @@ const config = [
 ];
 
 const resolveConfig: ResolveConfig<TypeDocConfig | { typedocOptions: TypeDocConfig }> = config => {
-  config = 'typedocOptions' in config ? config.typedocOptions : config; // exception for `tsconfig.json`
-  return (config?.plugin ?? []).map(toDeferResolve);
+  const cfg = 'typedocOptions' in config ? config.typedocOptions : config; // exception for `tsconfig.json`
+  const plugins = cfg?.plugin ?? [];
+  const themes = cfg?.theme ?? [];
+  return [...plugins, ...themes].map(toDeferResolve);
+};
+
+const args = {
+  resolve: ['plugin', 'theme'],
 };
 
 export default {
@@ -35,4 +41,5 @@ export default {
   packageJsonPath,
   config,
   resolveConfig,
+  args,
 } satisfies Plugin;
diff --git a/packages/knip/src/plugins/typedoc/types.ts b/packages/knip/src/plugins/typedoc/types.ts
index 3f867278..94d0311b 100644
--- a/packages/knip/src/plugins/typedoc/types.ts
+++ b/packages/knip/src/plugins/typedoc/types.ts
@@ -1,3 +1,4 @@
 export type TypeDocConfig = {
   plugin?: string[];
+  theme?: string[];
 };