diff --git a/bucket/kotlin.json b/bucket/kotlin.json
index dd199c43f2..22b442b578 100644
--- a/bucket/kotlin.json
+++ b/bucket/kotlin.json
@@ -1,13 +1,13 @@
 {
-    "version": "2.1.20",
+    "version": "2.1.21",
     "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/v2.1.20/kotlin-compiler-2.1.20.zip",
-    "hash": "a118197b0de55ffab2bc8d5cd03a5e39033cfb53383d6931bc761dec0784891a",
+    "url": "https://github.com/JetBrains/kotlin/releases/download/v2.1.21/kotlin-compiler-2.1.21.zip",
+    "hash": "1ba08a8b45da99339a0601134cc037b54cf85e9bc0edbe76dcbd27c2d684a977",
     "extract_dir": "kotlinc",
     "bin": [
         "bin\\kapt.bat",