diff --git a/src/index.tsx b/src/index.tsx
index bfec7a1..317e5f6 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -8,7 +8,7 @@ interface Props {
   width?: number
   height?: number
   contained?: boolean;
-  config?: Partial<Config>
+  config?: Config
 }
 
 function Chessground({