Just snug it down good with a box-end wrench: while it usually won't leak hand tight, you don't want to hear what it sounds like if'n the hose breaks loose, "I see your lips moving but no words are coming out of yourt mouth..."
Hand tighten then SNUG down with the proper wrench, I usually recommend using 2 fingers on the wrench. DO NOT tighten a hose connection more in an attempt to stop a leak. The oring does the sealing and does NOT require a tight connection to work. If the hose is fully seated and it leaks, you have a bad oring, the wrong oring or a seating surface issue and more torque on the connection will only serve to make matters worse. Also, I know a lot will argue with me but a slight amount of lubrication on the oring is also needed. The oring must slide into place as it's being installed and to work properly, proper lubrication in needed to help accomplish this.