diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 149b981..89ff40c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -16,7 +16,7 @@ The repository currently uses:
 | --- | --- | --- |
 | JDK | 21 | Make Java available to the wrapper; the build also requests a Java 21 toolchain. |
 | Gradle | 9.7.1 | Use the checked-in wrapper. |
-| Kotlin | 2.4.10 | Resolved by Gradle. |
+| Kotlin | 2.4.20 | Resolved by Gradle. |
 | Android Gradle Plugin | 9.4.0 | Resolved by Gradle. |
 | Android SDK platform | 37 | Install it and Platform-Tools through the Android SDK Manager. |
 
diff --git a/README.md b/README.md
index a94a5f4..d21787a 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ Use `api` plus framework `export(...)` when Swift needs these types; follow the
 
 | Requirement | Value |
 | --- | --- |
-| Kotlin compiler | 2.4 or newer; this repository builds with 2.4.10 |
+| Kotlin compiler | 2.4 or newer; this repository builds with 2.4.20 |
 | JVM bytecode target | 11 or newer, including Android consumers |
 | Android devices | API 21 or newer |
 | Android compile SDK | 34 or newer |
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index e255840..92165f0 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,7 +1,7 @@
 [versions]
 android-gradle-plugin = "9.4.0"
 androidx-startup = "1.2.0"
-kotlin = "2.4.10"
+kotlin = "2.4.20"
 kotlinx-coroutines = "1.11.0"
 maven-publish = "0.37.0"