diff --git a/build_tools/llvm_version.txt b/build_tools/llvm_version.txt
index 0940121..8ffb168 100644
--- a/build_tools/llvm_version.txt
+++ b/build_tools/llvm_version.txt
@@ -1,2 +1,2 @@
-620adacf87a376ec536ccc66af59df5bb4dc3b38
+1a7d7f423e756922042753f8a2fdc0418b87381a