diff --git a/knotserver/db/known_dids.go b/knotserver/db/known_dids.go
index 35535841..e010efb1 100644
--- a/knotserver/db/known_dids.go
+++ b/knotserver/db/known_dids.go
@@ -1,7 +1,7 @@
 package db
 
 func (d *DB) AddDid(did string) error {
-	_, err := d.db.Exec(`insert into known_dids (did) values (?)`, did)
+	_, err := d.db.Exec(`insert or ignore into known_dids (did) values (?)`, did)
 	return err
 }
 
diff --git a/knotserver/db/pubkeys.go b/knotserver/db/pubkeys.go
index e80796c9..d1b20176 100644
--- a/knotserver/db/pubkeys.go
+++ b/knotserver/db/pubkeys.go
@@ -33,7 +33,7 @@ func (d *DB) AddPublicKey(pk PublicKey) error {
 		pk.Created = time.Now().Format("2006-01-02 15:04:05.99999999 -0700 MST m=-0000.000000000")
 	}
 
-	query := `insert into public_keys (did, key, created) values (?, ?, ?)`
+	query := `insert or ignore into public_keys (did, key, created) values (?, ?, ?)`
 	_, err := d.db.Exec(query, pk.Did, pk.Key, pk.Created)
 	return err
 }