--- a/Tools/jit/_llvm.py	2025-04-09 09:06:26.989472956 +0700
+++ b/Tools/jit/_llvm.py	2025-04-09 09:06:41.490569826 +0700
@@ -10,9 +10,9 @@
 
 import _targets
 
-_LLVM_VERSION = 19
+_LLVM_VERSION = 21
 _LLVM_VERSION_PATTERN = re.compile(rf"version\s+{_LLVM_VERSION}\.\d+\.\d+\S*\s+")
-_EXTERNALS_LLVM_TAG = "llvm-19.1.7.0"
+_EXTERNALS_LLVM_TAG = "llvm-21.1.4.0"
 
 _P = typing.ParamSpec("_P")
 _R = typing.TypeVar("_R")