diff --git a/fsm/config/config.go b/fsm/config/config.go
index 7713e833..ba2f1e39 100644
--- a/fsm/config/config.go
+++ b/fsm/config/config.go
@@ -5,7 +5,7 @@ import "time"
 const (
 	// Signature proposal
 	UsernameMinLength                         = 3
-	UsernameMaxLength                         = 15
+	UsernameMaxLength                         = 150
 	ParticipantPubKeyMinLength                = 10
 	DkgPubKeyMinLength                        = 10
 	SignatureProposalSigningThresholdMinCount = 2