Images not scaling properly on mobile devices

Here is an example:
http://dev.ellenwalkerdesign.com/residential-services/

When screen size scales down and/or is viewed on a phone, the image squishes horizontally.
If I add a caption, it scales properly but I don't always want to add a caption

Thanks for your help!

 

Hello,

Paste this code in Custom CSS
Appearance > Theme Option > Styling Option > Custom CSS

Code:

 .content-wrap img {
height: auto;
}

Thanks & Regards
Gourav Shrivastava

 

Thank-you. That fixed it!