diff --git a/lib/svgo.d.ts b/lib/svgo.d.ts
index 01f79e142..ca1d7497b 100644
--- a/lib/svgo.d.ts
+++ b/lib/svgo.d.ts
@@ -88,7 +88,7 @@ export type Config = {
   datauri?: DataUri;
 };
 
-type Output = {
+export type Output = {
   data: string;
 };