## Description The dependency constraint currently blocks PySpark 4.0.0 and above: ```toml spark-base = ["pyspark>=2.2, <4.0"] ``` However, [PySpark 4.0.0 was released](https://spark.apache.org/news/spark-4-0-0-released.html) earlier this year. The current upper bound prevents users from using the latest version of PySpark. ## Context Upgrading to PySpark 4.0.0 would allow users to take advantage of new features, performance improvements, and bug fixes introduced in Spark 4. ## Possible Implementation Relax the dependency constraint to: ```toml spark-base = ["pyspark>=2.2, <5.0"] ```