appcompat-v7:28.0.0-rc02 doesn't work with design:28.0.0-rc01(should be rc02, but we can't)
com.android.support:appcompat-v7:28.0.0-rc02 com.android.support:design:28.0.0-rc01 -> should be rc02, but there's no rc02 actually. error: app/build.gradle:74: Error: All com.android.support libraries must use the exact same version specification (mixing versions can lead to runtime crashes). Found versions 28.0.0-rc02, 28.0.0-rc01. Examples include com.android.support:animated-vector-drawable:28.0.0-rc02 and com.android.support:cardview-v7:28.0.0-rc01 [GradleCompatible] I know it's a warning, we have turned to warn as the errors in CI in order to avoid the potential dead crashes, well, any solution except turn off option for CI? issue UPDATE Design library version 28.0.0-cr02 published. OLD ANSWER According to this link https://mvnrepository.com/artifact/com.android.support/design?repo=google design:28.0.0-rc02 not yet published. So all you can do for now is use the previous version for appcompat and wait until design library new version28.0.0-cr02 release. So for now...