diff --git a/bucket/kotlin.json b/bucket/kotlin.json
index b568799d73..58c659441d 100644
--- a/bucket/kotlin.json
+++ b/bucket/kotlin.json
@@ -1,13 +1,13 @@
 {
-    "version": "1.9.20",
+    "version": "1.9.21",
     "description": "A cross-platform, statically typed, general-purpose programming language with type inference.",
     "homepage": "https://kotlinlang.org/",
     "license": "Apache-2.0",
     "suggest": {
         "JDK": "java/openjdk"
     },
-    "url": "https://github.com/JetBrains/kotlin/releases/download/v1.9.20/kotlin-compiler-1.9.20.zip",
-    "hash": "15a8a2825b74ccf6c44e04e97672db802d2df75ce2fbb63ef0539bf3ae5006f0",
+    "url": "https://github.com/JetBrains/kotlin/releases/download/v1.9.21/kotlin-compiler-1.9.21.zip",
+    "hash": "cf17e0272bc065d49e64a86953b73af06065370629f090d5b7c2fe353ccf9c1a",
     "extract_dir": "kotlinc",
     "bin": [
         "bin\\kotlin.bat",