diff --git a/build_tools/llvm_version.txt b/build_tools/llvm_version.txt
index 8aa1042..1cf47e2 100644
--- a/build_tools/llvm_version.txt
+++ b/build_tools/llvm_version.txt
@@ -1,2 +1,2 @@
-aafb3662103f4b3df315967c0cf4f6eec6bff0c4
+c266c56d545dfecf767b312771f716b394c5d5eb