diff --git a/packages/validation/src/Review/index.ts b/packages/validation/src/Review/index.ts
index d89e2c2..50f1331 100644
--- a/packages/validation/src/Review/index.ts
+++ b/packages/validation/src/Review/index.ts
@@ -22,9 +22,7 @@ const proposalFapReviewCommentValidationSchema = () => {
 
 export const proposalGradeValidationSchema = Yup.object().shape({
   comment: proposalFapReviewCommentValidationSchema(),
-  grade: Yup.number()
-    .min(1, 'Lowest grade is 1')
-    .max(10, 'Highest grade is 10')
+  grade: Yup.string()
     .required(),
 });