Thesis „An attempt to apply an agile approach in a traditional firm“ describes the application of an agile approach in private, family oriented company Promissio d.o.o. Osijek. The firm has been operating for more than ten years now and has applied a traditional approach. Younger generations, who are working now in the firm, transformed their business activities and from one unit within the company created several different departments. That way access and work of all employees was facilitated. Agile approach in traditional firms showed good results that led to positive financial outcomes and successful business activities. In this company, the concept of family business is important. All family members are working in this company, they complement each other and they know all the important informations at all times. The aim of this thesis is to show how a company that has been in business for more than 10 years, has operated according to the traditional approach and changed its business from a traditional to an agile approach. Also, in this thesis will be shown the analysis of growth and development of the firm. In this paper will be also presented the way the agile approach is applied and its advantages and disadvantages. The purpose and goal of the paper is to explain the gradual change of the company Promissio d.o.o. through years of business, the introduction of new ideas and the division of labor. Until a few years ago, the company was run by one person who was in charge of all affairs - procurement, sales, administration. With the entry of younger members into the family business, the jobs were divided into several people and everyone did their part of the job conscientiously. In many family businesses, problems often arise because the heir children do not want to continue what their parents started and the business must be shut down at the age of the parents. In this paper, I want to emphasize that the company started by my parents, at this time we all run together and my sister and I want to continue to do what our parents have raised through the years of business.