In the upstream issue it's noted that javacc 6.1.3 was never released:
" This tagged release may or may not be released, but is tagged here so that we maintain a history prior to merging in Francis' substantial changes. " https://github.com/javacc/javacc/releases/tag/release_6_1_3 6.1.2 is the most recent 6.x on Maven Central: https://search.maven.org/artifact/net.java.dev.javacc/javacc And that works as expected: https://github.com/simonpoole/OpeningHoursParser/issues/72#issuecomment-1129016265 Would you consider downgrading to 6.1.2? Kind Regards, Bas -- GPG Key ID: 4096R/6750F10AE88D4AF1 Fingerprint: 8182 DE41 7056 408D 6146 50D1 6750 F10A E88D 4AF1