diff --git a/src/declarations.ts b/src/declarations.ts
index 9cb33dd..4b173c5 100644
--- a/src/declarations.ts
+++ b/src/declarations.ts
@@ -1,6 +1,7 @@
 export * from '@stencil/core/internal';
+import {ProcessOptions} from "postcss"
 
-export interface PluginOptions {
+export interface PluginOptions extends Omit<ProcessOptions, "from">  {
   injectGlobalPaths?: string[];
   plugins?: any[];
 }
diff --git a/src/index.ts b/src/index.ts
index 62437e0..ed40cef 100755
--- a/src/index.ts
+++ b/src/index.ts
@@ -30,6 +30,11 @@ export function postcss(opts: d.PluginOptions = {}): d.Plugin {
       return new Promise<d.PluginTransformResults>((resolve) => {
         postCss(renderOpts.plugins)
           .process(renderOpts.data, {
+            map: opts.map || undefined,
+            parser: opts.parser || undefined,
+            stringifier: opts.stringifier || undefined,
+            syntax: opts.syntax || undefined,
+            to: opts.to || undefined,
             from: fileName,
           })
           .then((postCssResults) => {