Brazilian company Suzano SA, the world’s largest producer of wood pulp, warns of supply issues in the weeks ahead because of the giant cargo container ship blocking traffic in Egypt’s Suez Canal — a critical global trade route, Bloomberg reports.

Wood pulp is the raw material used for various paper products, including toilet tissue.

“With demand surging for ships that carry ribbed steel containers, the squeeze is starting to spill over to break bulk and threatens to delay the company’s shipments,” Suzano CEO Walter Schalka told Bloomberg, per Yahoo! Finance. He said toilet paper shortages could occur if producers don’t have enough inventory.