diff --git a/pom.xml b/pom.xml
index 6e49126..afa720d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -144,7 +144,7 @@
     <jmh.version>1.37</jmh.version>
     <junit.version>5.11.2</junit.version>
     <log4j.version>2.24.1</log4j.version>
-    <kotlin.version>2.0.20</kotlin.version>
+    <kotlin.version>2.0.21</kotlin.version>
     <kotlinx.coroutines.version>1.6.4</kotlinx.coroutines.version>
     <mockito-kotlin.version>4.1.0</mockito-kotlin.version>
 
diff --git a/src/changelog/.1.x.x/update_org_jetbrains_kotlin_kotlin_stdlib.xml b/src/changelog/.1.x.x/update_org_jetbrains_kotlin_kotlin_stdlib.xml
index 6b7274b..3ea7255 100644
--- a/src/changelog/.1.x.x/update_org_jetbrains_kotlin_kotlin_stdlib.xml
+++ b/src/changelog/.1.x.x/update_org_jetbrains_kotlin_kotlin_stdlib.xml
@@ -3,6 +3,6 @@
        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="91" link="https://github.com/apache/logging-log4j-kotlin/pull/91"/>
-  <description format="asciidoc">Update `org.jetbrains.kotlin:kotlin-stdlib` to version `2.0.20`</description>
+  <issue id="97" link="https://github.com/apache/logging-log4j-kotlin/pull/97"/>
+  <description format="asciidoc">Update `org.jetbrains.kotlin:kotlin-stdlib` to version `2.0.21`</description>
 </entry>