The number of jobs advertised online in the U.S. fell by 153,600 in July to approximately 4.79 million, according to a report released today by The Conference Board. July marked a drop in labor demand after a strong gain of job ads in June.

“Over the last three years labor demand continued to move forward, albeit slowly, making this a very slow-growth recovery and an indication of the lingering economic uncertainty of employers,” said June Shelp, vice president at The Conference Board.

The Conference Board’s help wanted online report collects job ad information from more than 1,000 job boards.