diff --git a/task/assigner/assigner.go b/task/assigner/assigner.go
index 9dca1d59..c771aeb8 100644
--- a/task/assigner/assigner.go
+++ b/task/assigner/assigner.go
@@ -58,7 +58,7 @@ func (r *assigner) assign(tids []common.Hash) error {
 		prover := provers[rand.Intn(len(provers))]
 
 		sig := t.Signature
-		sig[64] += 27
+		//sig[64] += 27
 
 		tas = append(tas, minter.TaskAssignment{
 			ProjectId: t.ProjectID,