How to NOT reset section numbering after a new chapter?

I'm translating a book where the author originally wrote the section numbering straight through the chapters, without resetting the numbering, and I wanted to keep this original structure. In the original, the table of contents is like,

 1. First chapter   1.1 First Section   1.2 Second section 2. Second Chapter   2.1 Third section   2.2 Fourth section

and so on. I have tried every thing I could but the section numbers keep resetting after a new chapter.