diff --git a/CHANGES.md b/CHANGES.md
index d5443669a0..54851111ac 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -10,6 +10,8 @@ This document is intended for Spotless developers.
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `1.27.0`).
 
 ## [Unreleased]
+### Changes
+* Bump palantir-java-format for Java 21 ([#1822](https://github.com/diffplug/spotless/pull/1822))
 
 ## [2.43.0] - 2023-11-27
 ### Added
diff --git a/lib/src/main/java/com/diffplug/spotless/java/PalantirJavaFormatStep.java b/lib/src/main/java/com/diffplug/spotless/java/PalantirJavaFormatStep.java
index f769ad09ec..2c3b84c40d 100644
--- a/lib/src/main/java/com/diffplug/spotless/java/PalantirJavaFormatStep.java
+++ b/lib/src/main/java/com/diffplug/spotless/java/PalantirJavaFormatStep.java
@@ -30,7 +30,7 @@ private PalantirJavaFormatStep() {}
 	private static final String DEFAULT_STYLE = "PALANTIR";
 	private static final String NAME = "palantir-java-format";
 	private static final String MAVEN_COORDINATE = "com.palantir.javaformat:palantir-java-format:";
-	private static final Jvm.Support<String> JVM_SUPPORT = Jvm.<String> support(NAME).add(8, "1.1.0").add(11, "2.28.0");
+	private static final Jvm.Support<String> JVM_SUPPORT = Jvm.<String> support(NAME).add(8, "1.1.0").add(11, "2.28.0").add(21, "2.38.0");
 
 	/** Creates a step which formats everything - code, import order, and unused imports. */
 	public static FormatterStep create(Provisioner provisioner) {
diff --git a/plugin-gradle/CHANGES.md b/plugin-gradle/CHANGES.md
index 14e39cbae5..df1bbf9fe3 100644
--- a/plugin-gradle/CHANGES.md
+++ b/plugin-gradle/CHANGES.md
@@ -2,6 +2,11 @@
 
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `3.27.0`).
 
+
+## [Unreleased]
+### Changes
+* Bump palantir-java-format for Java 21 ([#1822](https://github.com/diffplug/spotless/pull/1822))
+
 ## [Unreleased]
 ### Fixed
 * Fix a stuck mavencentral sync from `6.23.1`.
diff --git a/plugin-maven/CHANGES.md b/plugin-maven/CHANGES.md
index 6313c8c8b5..4db7ee51ef 100644
--- a/plugin-maven/CHANGES.md
+++ b/plugin-maven/CHANGES.md
@@ -3,6 +3,8 @@
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `1.27.0`).
 
 ## [Unreleased]
+### Changes
+* Bump palantir-java-format for Java 21 ([#1822](https://github.com/diffplug/spotless/pull/1822))
 
 ## [2.41.0] - 2023-11-27
 ### Added