Version in Mojo

Hi,

i'm new to maven, and now i have the following problem. I have a custom
Mojo, and the Mojo should print the own version stored in the pom.xml of
this mojo. And now i have trouble to get this version. I have tried the
project.version, but this is always the version of the pom, that calls my
Mojo. A easy way, will be when the version is hardcoded, but this is not the
best way, becausae each time when the version is changed (release) i must
change it manually.
Is there a better way to get this version?

Thank you in advance!