diff --git a/pkg/database/types.go b/pkg/database/types.go
index a24998e..baaf6cc 100644
--- a/pkg/database/types.go
+++ b/pkg/database/types.go
@@ -17,6 +17,10 @@ const (
 	RedsysSignedRequestTypeName = "redsys_signed_request"
 )
 
+var (
+	oidCache = make(map[string]uint32)
+)
+
 func registerTypes(ctx context.Context, conn *pgx.Conn) error {
 	uriOID, err := registerType(ctx, conn, &pgtype.Text{}, "uri")
 	if err != nil {
@@ -65,8 +69,12 @@ func registerTypes(ctx context.Context, conn *pgx.Conn) error {
 }
 
 func registerType(ctx context.Context, conn *pgx.Conn, value pgtype.Value, name string) (oid uint32, err error) {
-	if err = conn.QueryRow(ctx, "select $1::regtype::oid", name).Scan(&oid); err != nil {
-		return
+	var found bool
+	if oid, found = oidCache[name]; !found {
+		if err = conn.QueryRow(ctx, "select $1::regtype::oid", name).Scan(&oid); err != nil {
+			return
+		}
+		oidCache[name] = oid
 	}
 	conn.ConnInfo().RegisterDataType(pgtype.DataType{Value: value, Name: name, OID: oid})
 	return