def replace_dict_value(dictionary, old_value, new_value):
    """ Selectively replaces values in a dictionary
    
    Parameters:
        :dictionary(dict): input dictionary
        :old_value: value to be replaced
        :new_value: value to replace
        
    Returns:
        :output_dictionary (dict): dictionary with replaced values"""

    for key, value in dictionary.items():
        if value == old_value:
            dictionary[key] = new_value
    return dictionary