diff --git a/build_tools/llvm_version.txt b/build_tools/llvm_version.txt
index b4625d8..08bfc04 100644
--- a/build_tools/llvm_version.txt
+++ b/build_tools/llvm_version.txt
@@ -1,2 +1,2 @@
-f6decfa36d89a308ef6769a38b836d1352c10fb4
+b999400a4fb645cab6d8abcb1ce9146775f69c64