diff --git a/WORKSPACE b/WORKSPACE
index 916c23a..752f54c 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -15,9 +15,9 @@
 
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
-LLVM_COMMIT = "482283042f795ecc27838a3b2f76b5494991401c"
+LLVM_COMMIT = "c51e91e04681587e7ddd2b20f4e06272c040aa48"
 
-LLVM_SHA256 = "350b8bd0def4bef191b512a79923c3e591e47b189d63e37abf149ac4751d2334"
+LLVM_SHA256 = "3706486e7eedfaa046993b8b802cff6b206e6d8a8b473bbbb1b485ae8e7c95ec"
 
 LLVM_BAZEL_TAG = "llvm-project-{commit}".format(commit = LLVM_COMMIT)
 
diff --git a/build_tools/llvm_version.txt b/build_tools/llvm_version.txt
index e785cdd..d8ac7dd 100644
--- a/build_tools/llvm_version.txt
+++ b/build_tools/llvm_version.txt
@@ -1,2 +1,2 @@
-482283042f795ecc27838a3b2f76b5494991401c
+c51e91e04681587e7ddd2b20f4e06272c040aa48