diff --git a/packages/common/src/types.ts b/packages/common/src/types.ts
index 10e52a2f..16c28233 100644
--- a/packages/common/src/types.ts
+++ b/packages/common/src/types.ts
@@ -4,4 +4,10 @@ interface Config {
   bitmapsDir: string;
 }
 
-export { Config };
+interface Frames {
+  [fileName: string]: {
+    buffer: Buffer;
+  };
+}
+
+export { Config, Frames };