Beijing-The world’s longest glass bridge, over a scenic canyon in China, has been closed less than two weeks after it opened after being overwhelmed by a swarm of visitors.

More than 10,000 visitors a day flooded over the Guinness record-setting attraction, overwhelming managers who had planned to limit visitors to no more than 8,000, local media reported.

The bridge is undergoing “an internal system upgrade,” the official Xinhua News service quoted officials as saying, but did not specify when it would reopen.

The group in charge of the attraction said that it would use the closure to update “software and hardware” related to managing visitors, Xinhua said Friday.

Some 430 meters long and suspended 300 meters above the earth, the bridge spans the canyon between two mountain cliffs in Zhangjiajie park in China’s central Hunan province.