diff --git a/bucket/mingw-mstorsjo-llvm-ucrt.json b/bucket/mingw-mstorsjo-llvm-ucrt.json
index b516e5b321..2de0aa6515 100644
--- a/bucket/mingw-mstorsjo-llvm-ucrt.json
+++ b/bucket/mingw-mstorsjo-llvm-ucrt.json
@@ -1,23 +1,23 @@
 {
-    "version": "21.1.3-20251007",
+    "version": "21.1.4-20251021",
     "description": "LLVM toolchain based on mingw-w64. (UCRT, mstorsjo build)",
     "homepage": "https://github.com/mstorsjo/llvm-mingw/",
     "license": "GPL-3.0-or-later,ZPL-2.1,Apache-2.0 WITH LLVM-exception,ISC",
     "architecture": {
         "64bit": {
-            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20251007/llvm-mingw-20251007-ucrt-x86_64.zip",
-            "hash": "9b98a1331b9787bbec5da2a2b78704809b91d807c26acc08b9d377292b92baf0",
-            "extract_dir": "llvm-mingw-20251007-ucrt-x86_64"
+            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20251021/llvm-mingw-20251021-ucrt-x86_64.zip",
+            "hash": "0a0ce4733b54de8c4858ecfc2a08447de57728dccf9fbf7fcba3ce7e0d0c6af8",
+            "extract_dir": "llvm-mingw-20251021-ucrt-x86_64"
         },
         "32bit": {
-            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20251007/llvm-mingw-20251007-ucrt-i686.zip",
-            "hash": "d2d14ac47db9b64371bab1784511e6ec112497694ba36f79d25e96b1b959d6e0",
-            "extract_dir": "llvm-mingw-20251007-ucrt-i686"
+            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20251021/llvm-mingw-20251021-ucrt-i686.zip",
+            "hash": "e1f7358fb78e6e4744494a96ff02680fd05937dee6bdcbe7d44df161f95eccce",
+            "extract_dir": "llvm-mingw-20251021-ucrt-i686"
         },
         "arm64": {
-            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20251007/llvm-mingw-20251007-ucrt-aarch64.zip",
-            "hash": "b3384bb167805fde7c82e9a0e3f62d92d7f5b80a2c87a05babadddd49b31062c",
-            "extract_dir": "llvm-mingw-20251007-ucrt-aarch64"
+            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20251021/llvm-mingw-20251021-ucrt-aarch64.zip",
+            "hash": "d31dd2799c18440acb7cc13b03cadfc3069dff48168cd406a44930e965b09655",
+            "extract_dir": "llvm-mingw-20251021-ucrt-aarch64"
         }
     },
     "post_install": "Copy-Item \"$dir\\bin\\mingw32-make.exe\" \"$dir\\bin\\make.exe\"",