On Friday, Lisa Besser, the daughter of missing Krull, announced that the reward has been upped to $20,000.

“Please someone must have seen or known something,” Besser said in a Facebook posting. “Even if you think it’s not important, phone in anything suspicious you may have seen that morning. It could seem small, but could be the link to help find her.”

READ MORE: Police search for missing woman

The 57-year-old grandmother has been missing since the morning of July 11, when she left for a morning walk in the area of East Kildonan.

The reward was initially started at $5,000 by the amalgamated and international transit union; Krull’s husband is a bus driver in Winnipeg.

READ MORE: Winnipeg police ‘grasping at straws’ in Thelma Krull case

Now, through fundraising efforts by family and friends and an increase in funds from the transit union, they have been able to increase the reward.

On Saturday, Krull’s family and friends will be selling bumper stickers and safety whistles at the Tim Horton’s on Plessis Road to continue to keep the woman’s disappearance and the forefront of Winnipegger’s minds.

WATCH: Walk planned for missing Thelma Krull

Police continue to receive tips on a regular basis.