The US House of Representatives approved a bill on Thursday that protects the right of workers to unionize.

The bill, known as The Protecting the Right to Organize Act (PRO Act), was passed by a 224-193 vote. The final vote was mainly along party lines. The bill would amend the National Labor Relations Act, the Labor Management Relations Act of 1947 and the Labor Management Reporting and Disclosure Act of 1959.

The PRO Act would make it easier “for workers to certify unions, change how employers classify workers, prevent workers from being denied rights because of immigration status, eliminate state right-to-work laws and block laws that protect employees from not paying union dues.”

The House Education and Labor Committee Chairman, Bobby Scott (D-VA), first introduced the bill, and it has 218 co-sponsors. The bill now awaits the approval of the Republican-majority Senate.