diff --git a/WORKSPACE b/WORKSPACE
index 73dc671..1a44400 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -15,9 +15,9 @@
 
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
-LLVM_COMMIT = "df6d0579e18e868ef4b6e97794eacd5af86e1b8a"
+LLVM_COMMIT = "4c973ae51b859dca9792e1ad87a6673c49815a8d"
 
-LLVM_SHA256 = "badaf6e0e5331669a7d572e0c45f2ed611629e9340a0212e891acbd29730f069"
+LLVM_SHA256 = "b8bdb45cd65c949eaff5d578f79d1a25a530add079a27b2cbc3b26964e2bfa63"
 
 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 0c954fe..156d0fd 100644
--- a/build_tools/llvm_version.txt
+++ b/build_tools/llvm_version.txt
@@ -1,2 +1,2 @@
-df6d0579e18e868ef4b6e97794eacd5af86e1b8a
+4c973ae51b859dca9792e1ad87a6673c49815a8d