Error updating Vaddin version (flute jar)

I’m (finally) upgrading from Vaadin from version 7.1.11 to 7.5.2 but I receive an error when I try to compile it with Maven:

POM for ‘com.vaadin.external.flute:flute:pom:1.3.0.gg2:compile’ is invalid.
Its dependencies (if any) will NOT be available to the current build.

Any ideas?

I resolved this issue by manually downloading both the flute-1.3.0.gg2.jar and flute-1.3.0.gg2.pom files and placing them in my maven repository.