diff --git a/nixos/doc/manual/release-notes/rl-2211.section.md b/nixos/doc/manual/release-notes/rl-2211.section.md
index be0d17f9054d..53daf9544634 100644
--- a/nixos/doc/manual/release-notes/rl-2211.section.md
+++ b/nixos/doc/manual/release-notes/rl-2211.section.md
@@ -139,6 +139,8 @@ Use `configure.packages` instead.
 
 - The Redis module now disables RDB persistence when `services.redis.servers.<name>.save = []` instead of using the Redis default.
 
+- Neo4j was updated from version 3 to version 4. See this [migration guide](https://neo4j.com/docs/upgrade-migration-guide/current/) on how to migrate your Neo4j instance.
+
 - Matrix Synapse now requires entries in the `state_group_edges` table to be unique, in order to prevent accidentally introducing duplicate information (for example, because a database backup was restored multiple times). If your Synapse database already has duplicate rows in this table, this could fail with an error and require manual remediation.
 
 - `dockerTools.buildImage` deprecates the misunderstood `contents` parameter, in favor of `copyToRoot`.