See the general compatibility guidelines.
Starting from Akka Http 10.1.0, an explicit dependency to the
akka-stream module is necessary. See Compatibility with Akka for more information. The minimum Akka version currently required is Akka 2.5.11.
Methods deprecated during 10.0.x but before 10.0.11 were removed in 10.1.0. When still compiling with 10.0.11 make sure not to refer to deprecated methods. The deprecation notices usually give hints about alternatives.
The return type of
ServerBinding.unbind has been changed to
CompletionStage[Done] for consistency. It previously returned an element type of
BoxedUnit. Both the old and new types can be ignored, so in most cases, no action is necessary. If you typed out the return type somewhere, change the type to