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The industry 4.0 paradigm has emerged as a strong guide for contemporary manufacturing. Despite the use of these technologies in the manufacturing processes, the industry 4.0 technologies also can be incorporated into the integration of the supply chains, which is known as smart supply chain. Currently, there are several available technologies under the industry 4.0 concept, such as blockchain, the internet of things, cloud computing, big data, among others. However, from the point of view of firms, the adoption of industry 4.0 technologies in the supply chain is challenging as it can involve the reformulation of the relationship with tens or hundreds of partners. In real conditions, all these issues should be treated under several constraints such as financial, time, knowledge of technology, among others. As a result, the real attitude to the adoption of industry 4.0 technologies in the supply chain should begin with the assessment of several issues related to the company and its external agents. This article proposes a roadmap to the adoption of industry 4.0 technologies in the supply chain through three main stages. The first one comprehends the assessment of the current technological status of the firm and the evaluation of the next steps to be pursued toward industry 4.0. The second involves the evaluation and prioritization of the partners that the technology defined in step one will be adopted. And the third stage details the actions to the adoption of the industry 4.0 technologies with each prioritized partner. This roadmap was validated in a company during its process to elaborate a guide to the adoption of industry 4.0 technologies with their main partners. Whereas this company has more than one hundred suppliers, this method seems to be very useful. Documental data and six supply chain professionals were interviewed to develop the roadmap and assess its steps. This roadmap appears to be a feasible and applicable tool for supporting firms in the lived dilemmas related to what industry 4.0 technologies to adopt in order to integrate their supply chains and how this process can be developed. [ABSTRACT FROM AUTHOR]