diff --git a/CHANGES.md b/CHANGES.md
index a4f4bf2e70..4229bc511b 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -11,6 +11,9 @@ We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (
 
 ## [Unreleased]
 
+## Changed
+* Bump default `gson` version to latest `2.11.0` -> `2.13.1`. ([#2414](https://github.com/diffplug/spotless/pull/2414))
+
 ## [3.2.0] - 2025-07-07
 ### Added
 * Support for `idea` ([#2020](https://github.com/diffplug/spotless/pull/2020), [#2535](https://github.com/diffplug/spotless/pull/2535))
diff --git a/lib/build.gradle b/lib/build.gradle
index 4f4addc2d5..115e5be32a 100644
--- a/lib/build.gradle
+++ b/lib/build.gradle
@@ -96,7 +96,7 @@ dependencies {
 	// googleJavaFormat
 	googleJavaFormatCompileOnly 'com.google.googlejavaformat:google-java-format:1.24.0'
 	// gson
-	gsonCompileOnly 'com.google.code.gson:gson:2.11.0'
+	gsonCompileOnly 'com.google.code.gson:gson:2.13.1'
 	// jackson
 	String VER_JACKSON='2.18.1'
 	jacksonCompileOnly "com.fasterxml.jackson.core:jackson-databind:$VER_JACKSON"
diff --git a/lib/src/main/java/com/diffplug/spotless/json/gson/GsonStep.java b/lib/src/main/java/com/diffplug/spotless/json/gson/GsonStep.java
index a690b02b95..31634afa88 100644
--- a/lib/src/main/java/com/diffplug/spotless/json/gson/GsonStep.java
+++ b/lib/src/main/java/com/diffplug/spotless/json/gson/GsonStep.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2022-2024 DiffPlug
+ * Copyright 2022-2025 DiffPlug
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -30,7 +30,7 @@ public class GsonStep implements Serializable {
 	private static final String MAVEN_COORDINATES = "com.google.code.gson:gson";
 	private static final String INCOMPATIBLE_ERROR_MESSAGE = "There was a problem interacting with Gson; maybe you set an incompatible version?";
 	public static final String NAME = "gson";
-	public static final String DEFAULT_VERSION = "2.11.0";
+	public static final String DEFAULT_VERSION = "2.13.1";
 
 	private final JarState.Promised jarState;
 	private final GsonConfig gsonConfig;
diff --git a/plugin-gradle/CHANGES.md b/plugin-gradle/CHANGES.md
index c35554a6eb..d2a80d31fd 100644
--- a/plugin-gradle/CHANGES.md
+++ b/plugin-gradle/CHANGES.md
@@ -4,6 +4,9 @@ We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (
 
 ## [Unreleased]
 
+## Changed
+* Bump default `gson` version to latest `2.11.0` -> `2.13.1`. ([#2414](https://github.com/diffplug/spotless/pull/2414))
+
 ## [7.1.0] - 2025-07-07
 ### Added
 * Support for `idea` ([#2020](https://github.com/diffplug/spotless/pull/2020), [#2535](https://github.com/diffplug/spotless/pull/2535))
diff --git a/plugin-maven/CHANGES.md b/plugin-maven/CHANGES.md
index e8e69c82f8..5fd50571d4 100644
--- a/plugin-maven/CHANGES.md
+++ b/plugin-maven/CHANGES.md
@@ -4,6 +4,9 @@ We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (
 
 ## [Unreleased]
 
+## Changed
+* Bump default `gson` version to latest `2.11.0` -> `2.13.1`. ([#2414](https://github.com/diffplug/spotless/pull/2414))
+
 ## [2.45.0] - 2025-07-07
 ### Added
 * Support for `idea` ([#2020](https://github.com/diffplug/spotless/pull/2020), [#2535](https://github.com/diffplug/spotless/pull/2535))