# Neptune openCypher restrictions
Restrictions

The Amazon Neptune release of openCypher still does not support everything that is specified in the [Cypher Query Language Reference, Version 9](https://s3.amazonaws.com/artifacts.opencypher.org/openCypher9.pdf), as is detailed in [openCypher specification compliance](feature-opencypher-compliance.md). Future releases are expected to address many of those limitations.