Koen Bouwman and Tobias Foss will also drive for Jumbo-Visma in the coming years.
The 27-year-old Dutchman and the 23-year-old Norwegian extended their contract with the Dutch formation on Tuesday during the first rest day of the Giro d'Italia.
Bouwman, who has been driving for Jumbo-Visma since 2016, has signed for three years and is now fixed until the end of 2024. De Gelderlander is currently in front of the Giro;
he took a shot at the stage victory on Sunday, but was then overtaken by Egan Bernal in the final.
After the first week and a half in Italy, Bouwman is the best Dutchman in thirtieth place.
He admits more than eleven minutes to Bernal, who crowned his stage victory on Sunday by conquering the pink jersey.
Bouwman is working on his sixth big round on behalf of Jumbo-Visma and is there for the fourth time in a row in the Giro, where he had to give up last year and previously finished 50th and 41st.
The talented Foss signed for two years and now has a contract until 2023. He has been riding for Jumbo-Visma since last year and is now in eighteenth place (+2.23) in the Giro the best classified rider of the team.
Jumbo-Visma has already extended several contracts
Bouwman and Foss are not the first Jumbo-Visma riders to renew their contracts this year.
The Dutch formation has previously recorded Steven Kruijswijk, Wout van Aert, Sepp Kuss, Robert Gesink and Jos van Emden, among others.
The Giro will last until next Sunday.
After the rest day, the peloton awaits a hilly ride over 162 kilometers between Perugia and Montalcino on Wednesday.