Capture of 'dateFormatter' with non-sendable type 'ISO8601DateFormatter' in a `@Sendable` closure

Question

I have the following code

let dateFormatter = ISO8601DateFormatter()
        dateFormatter.formatOptions.insert(.withFractionalSeconds)
        decoder.dateDecodingStrategy = .custom({ decoder in
            let container = try decoder.singleValueContainer()
            let dateStr = try container.decode(String.self)
            return dateFormatter.date(from: dateStr) ?? Date()   //warning
        })

How do I fix the warning?

Capture of 'dateFormatter' with non-sendable type 'ISO8601DateFormatter' in a @Sendable closure