Hello everybody, this morning weekly build of our software breaks with java.lang.ClassNotFoundException: ch.qos.logback.classic.spi.Configurator As we configure Gradle to apply runtimeOnly('ch.qos.logback:logback-classic:1.3+') this build receives new patch level version 1.3.9, published a few days ago. I've downloaded both versions, 1.3.8 and 1.3.9, of the lib from [1], missing class is available with 1.3.8, but missing in 1.3.9. General remark: I do not expect such a modification with patch level updates. My question: Is this a bug on your side, or have I missed some deprecation announcement explaining how to reconfigure Logback, or apply another Logback lib, or the like to avoid this problem? Thanks and regards Christian [1] https://mvnrepository.com/artifact/ch.qos.logback/logback-classic