The Scottish giants did not have an easy time, as they were held to a 1-1 draw at home against NK Osiek.
However, the 1-0 away win they secured last week came in handy, as the Gers were able to hold on for a place in the third qualifying round.
Nikola Katic calmed the home faithful with a goal eight minutes into the second half, giving Rangers a 1-0 lead.
They were secure in their position until the last minute, when Borna Barisic got an equalizer.
But Rangers were never going to capitulate and they saw out the game to progress.