The expression of type Map needs unchecked conversion

Question

I have this in my code:

ObjectMapper oMapper = new ObjectMapper();
Map<String, Object> objectMap = oMapper.convertValue(test, Map.class);

And i receive the following warning:

Type safety: The expression of type Map needs unchecked conversion to conform to Map<String,Object>

How can i solve this?

SOLUTION:

import com.fasterxml.jackson.core.type.TypeReference;

ObjectMapper oMapper = new ObjectMapper();
Map<String, Object> objectMap = oMapper.convertValue(prueba, new TypeReference<Map<String, Object>>(){});