diff --git a/frontend/src/ts/test/pace-caret.ts b/frontend/src/ts/test/pace-caret.ts
index 2f39479ad..402a23562 100644
--- a/frontend/src/ts/test/pace-caret.ts
+++ b/frontend/src/ts/test/pace-caret.ts
@@ -16,7 +16,7 @@ interface Settings {
   correction: number;
   currentWordIndex: number;
   currentLetterIndex: number;
-  wordsStatus: { [key: number]: any };
+  wordsStatus: { [key: number]: true | undefined };
   timeout: NodeJS.Timeout | null;
 }