An Iranian-British woman imprisoned in Iran faces a new charge of “spreading propaganda against the regime,” her husband said in a statement released on Monday.

Iranian judicial authorities did not confirm the new charge against the woman, Nazanin Zaghari-Ratcliffe. An employee of the Thomson Reuters Foundation, Ms. Zaghari-Ratcliffe was arrested in April 2016, accused of spying and planning the “soft toppling” of the Iranian government. Those accusations, which she and her husband, Richard Ratcliffe, have vehemently denied, resulted in a five-year sentence.

The new charges would seem to be related to a gaffe that the British foreign secretary, Boris Johnson, made during a speech in Parliament last year when he said Ms. Zaghari-Ratcliffe was “simply teaching people journalism.” In a court hearing in Iran days later, his words were cited as evidence that she was engaged in “propaganda against the regime.”

Mr. Ratcliffe said in the statement that his wife had learned of the new charge at a court hearing on Saturday before Judge Abolghassem Salavati of the hard-line Revolutionary Court in Tehran.