The 2025 Senate Joint Resolution 139 proposes an amendment to the Wisconsin Constitution that seeks to eliminate the exception allowing slavery and involuntary servitude as a punishment for crime. Currently, the constitution prohibits slavery and involuntary servitude but permits these practices if imposed on individuals who have been duly convicted of a crime. The proposed amendment would ensure that slavery and involuntary servitude are categorically prohibited without any exceptions.

To become effective, this constitutional amendment must be adopted by two successive legislatures and subsequently ratified by the public. The resolution has been introduced by a group of senators and co-sponsored by several representatives, and it has been referred to the Committee on Licensing, Regulatory Reform, State and Federal Affairs for further consideration. If passed, the amendment will be presented to voters in the next general election, with a requirement for publication three months prior to the election date.