diff --git a/management/server/peer/peer.go b/management/server/peer/peer.go
index e5475c07d..1b5804bd0 100644
--- a/management/server/peer/peer.go
+++ b/management/server/peer/peer.go
@@ -25,7 +25,7 @@ type Peer struct {
 	// AccountID is a reference to Account that this object belongs
 	AccountID string `json:"-" gorm:"index"`
 	// WireGuard public key
-	Key string // uniqueness index (check migrations)
+	Key string `gorm:"size:255;uniqueIndex"`
 	// IP address of the Peer
 	IP netip.Addr `gorm:"serializer:json"` // uniqueness index per accountID (check migrations)
 	// IPv6 overlay address of the Peer, zero value if IPv6 is not enabled for the account.