diff --git a/Tools/jit/_llvm.py b/Tools/jit/_llvm.py
--- a/Tools/jit/_llvm.py
+++ b/Tools/jit/_llvm.py
@@ -8,7 +8,7 @@
 import subprocess
 import typing
 
-_LLVM_VERSION = 19
+_LLVM_VERSION = 20
 _LLVM_VERSION_PATTERN = re.compile(rf"version\s+{_LLVM_VERSION}\.\d+\.\d+\S*\s+")
 
 _P = typing.ParamSpec("_P")