diff --git a/types/gulp-postcss/index.d.ts b/types/gulp-postcss/index.d.ts
index ab5027c396..8da43d1b15 100644
--- a/types/gulp-postcss/index.d.ts
+++ b/types/gulp-postcss/index.d.ts
@@ -8,7 +8,7 @@
 import Vinyl = require('vinyl');
 
 declare function GulpPostCss(plugins?: any[], options?: GulpPostCss.Options): NodeJS.ReadWriteStream;
-declare function GulpPostCss(callback?: (file: Vinyl) => { plugins?: string[], options?: GulpPostCss.Options }):
+declare function GulpPostCss(callback?: (file: Vinyl) => { plugins?: any[], options?: GulpPostCss.Options }):
     NodeJS.ReadWriteStream;
 
 declare namespace GulpPostCss {