Former U.S. House Speaker Dennis Hastert's prison release date has changed and is now 24 days later than initially expected. 

Hastert, who is serving a 15-month sentence for violating bank reporting requirements, was originally expected to be released July 23, 2017. But the date has now moved to August 16, 2017.

The Federal Bureau of Prisons has not detailed why the date was changed, with a spokesman telling the Chicago Sun-Times the reason "is not public information."

Requests for comment were declined by Hastert's legal representatives, according to the newspaper.  

The former Republican lawmaker received a 15-month prison sentence in late April for violating bank reporting requirements. The bank violations were in connection with a hush money scheme to conceal past sexual misconduct dating back to when Hastert, 74, was a teacher and wrestling coach at Yorkville High School.

He reported to the Minnesota-based Rochester Federal Medical Center last month.