-Build-Depends: debhelper (>= 4), libyaz4-dev, libyazpp4-dev (>= 1.2.3), libxslt1-dev, libboost-dev, libboost-thread-dev, libboost-test-dev
+Build-Depends: debhelper (>= 4), libyaz4-dev (>= 4.2.3), libyazpp4-dev (>= 1.2.6), libxslt1-dev, libboost-dev, libboost-thread-dev, libboost-test-dev