Servo Driven Pump

I created this peristaltic pump to automatically water my plant using a soil moisture monitor. I started with the peristaltic pump provided by hiuwo.

It is not quite working. I have found that as the pump turns the tubing will scoot through the pump. There needs to be some features on the end that will prevent the tube from slipping. On industrial pumps I have seen they have rigid fittings, and the tube inside the pump is different from the tube outside.