Pepper plants wilting?

http://imgur.com/a/syDiw I have a few pepper plants growing in pots in my backyard. They receive sunlight for most of the day, and I've been careful not to water them too much. The foliage has become soft, and the taller plants have become droopy. Does anyone know why this is? Thanks

Edit: Just gave them a nice soak, hopefully that will help them out. Edit 2: Plants look a lot healthier already!