diff --git a/log4j-parent/pom.xml b/log4j-parent/pom.xml
index baea08c8804..6e69d21286f 100644
--- a/log4j-parent/pom.xml
+++ b/log4j-parent/pom.xml
@@ -116,7 +116,7 @@
     <jctools.version>4.0.5</jctools.version>
     <jmdns.version>3.6.0</jmdns.version>
     <jmh.version>1.37</jmh.version>
-    <json-unit.version>3.5.0</json-unit.version>
+    <json-unit.version>4.0.0</json-unit.version>
     <jspecify.version>1.0.0</jspecify.version>
     <junit.version>4.13.2</junit.version>
     <junit-jupiter.version>5.11.3</junit-jupiter.version>
diff --git a/src/changelog/.3.x.x/update_net_javacrumbs_json_unit_json_unit.xml b/src/changelog/.3.x.x/update_net_javacrumbs_json_unit_json_unit.xml
new file mode 100644
index 00000000000..20a0aaf0ce8
--- /dev/null
+++ b/src/changelog/.3.x.x/update_net_javacrumbs_json_unit_json_unit.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<entry xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xmlns="https://logging.apache.org/xml/ns"
+       xsi:schemaLocation="https://logging.apache.org/xml/ns https://logging.apache.org/xml/ns/log4j-changelog-0.xsd"
+       type="updated">
+  <issue id="3213" link="https://github.com/apache/logging-log4j2/pull/3213"/>
+  <description format="asciidoc">Update `net.javacrumbs.json-unit:json-unit` to version `4.0.0`</description>
+</entry>