diff --git a/bucket/mingw-mstorsjo-llvm-ucrt.json b/bucket/mingw-mstorsjo-llvm-ucrt.json
index 2de0aa6515..e454ea0ab3 100644
--- a/bucket/mingw-mstorsjo-llvm-ucrt.json
+++ b/bucket/mingw-mstorsjo-llvm-ucrt.json
@@ -1,23 +1,23 @@
 {
-    "version": "21.1.4-20251021",
+    "version": "21.1.5-20251104",
     "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/20251021/llvm-mingw-20251021-ucrt-x86_64.zip",
-            "hash": "0a0ce4733b54de8c4858ecfc2a08447de57728dccf9fbf7fcba3ce7e0d0c6af8",
-            "extract_dir": "llvm-mingw-20251021-ucrt-x86_64"
+            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20251104/llvm-mingw-20251104-ucrt-x86_64.zip",
+            "hash": "171b298f46fa4b5653dc7b01cc5e709caca645991be8e1b0724466c4a282a1ac",
+            "extract_dir": "llvm-mingw-20251104-ucrt-x86_64"
         },
         "32bit": {
-            "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"
+            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20251104/llvm-mingw-20251104-ucrt-i686.zip",
+            "hash": "de775bbcb6dddcf83c0e5e791782d6c583ff943d24e0043f9642ffaa395e750f",
+            "extract_dir": "llvm-mingw-20251104-ucrt-i686"
         },
         "arm64": {
-            "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"
+            "url": "https://github.com/mstorsjo/llvm-mingw/releases/download/20251104/llvm-mingw-20251104-ucrt-aarch64.zip",
+            "hash": "a71358c7302cfa55a7ec1b86c75ab3672d11c21399fc5d5fa039c0b335b090db",
+            "extract_dir": "llvm-mingw-20251104-ucrt-aarch64"
         }
     },
     "post_install": "Copy-Item \"$dir\\bin\\mingw32-make.exe\" \"$dir\\bin\\make.exe\"",