Bolt Protocol and Neo4j compatibility

Bolt 6.x

Neo4j version Bolt 6.0

2025.10 - current[1]

x

Bolt 5.x

Neo4j version Bolt 5.0 Bolt 5.1 Bolt 5.2 Bolt 5.3 Bolt 5.4 Bolt 5.5 Bolt 5.6 Bolt 5.7 Bolt 5.8

5.0 - 5.4

x

5.5 - 5.6

x

x

5.7 - 5.8

x

x

x

5.9 - 5.12

x

x

x

x

5.13 - 5.22

x

x

x

x

x

5.23 - 5.25

x

x

x

x

x

x

5.26 - current[1]

x

x

x

x

x

x

x

x
Bolt version 5.5 is not used, and no Neo4j server will ever negotiate it.

Bolt 4.x

Neo4j version Bolt 4.0 Bolt 4.1 Bolt 4.2 Bolt 4.3 Bolt 4.4

4.0

x

4.1

(x)

x

4.2

(x)

(x)

x

4.3

(x)

(x)

(x)

x

4.4 - current[1]

(x)

(x)

(x)

(x)

x

Bolt 1-3

Neo4j version Bolt 1 Bolt 2 Bolt 3

3.0

x

3.1

x

3.2

x

3.3

x

3.4

(x)

x

3.5

(x)

x

4.0

(x)

4.1

(x)

4.2

(x)

4.3

(x)

4.4

(x)

(x) denotes that support could be removed in the next version of Neo4j.

1. " - current" includes all newer versions until further notice (inclduing newer major versions). At some point, the server might drop support for older Bolt versions, but there’s no plan or guarantee for when or if that will happen. As soon as a decision is made, it will be documented here.