TEHRAN, Iran (AP) — Iranians traveling to Israel could go to prison for up to five years instead of only three months, after Iran’s parliament revised an existing ban for such trips.

The measure reflects Tehran’s security concerns over archenemy Israel. Iran claims to have dismantled several purported Israeli spy rings in recent years and arrested Iranians with alleged links to Mossad.

Iranian state TV on Monday reported that parliament passed a new amendment, expanding the current prison term for travel to Israel to between two and five years.

Under a 1972 ban imposed by U.S.-backed Shah Mohammed Reza Pahlavi, offenders faced possible imprisonment of up to three months.

At the time, the law was designed to mostly avert travel to communist countries.