diff --git a/kotlin.json b/kotlin.json
index eaa1622cbf..214f57e4c8 100644
--- a/kotlin.json
+++ b/kotlin.json
@@ -1,9 +1,9 @@
 {
     "homepage": "https://kotlinlang.org/",
-    "version": "1.3.20",
+    "version": "1.3.21",
     "license": "Apache-2.0",
-    "url": "https://github.com/JetBrains/kotlin/releases/download/v1.3.20/kotlin-compiler-1.3.20.zip",
-    "hash": "2d505fb505c53db7fc6a2a570d97ba3b7a6d3526d4f64aee28de6fda7502f3f0",
+    "url": "https://github.com/JetBrains/kotlin/releases/download/v1.3.21/kotlin-compiler-1.3.21.zip",
+    "hash": "dbc7fbed67e0fa9a2f2ef6efd89fc1ef8d92daa38bb23c1f23914869084deb56",
     "extract_dir": "kotlinc",
     "bin": [
         "bin\\kotlin.bat",