diff --git a/.gitmodules b/.gitmodules
index 9bb68b37081..802d61eea29 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -33,7 +33,7 @@
 [submodule "src/llvm-project"]
 	path = src/llvm-project
 	url = https://github.com/rust-lang/llvm-project.git
-	branch = rustc/17.0-2023-12-14
+	branch = rustc/18.0-2024-02-13
 	shallow = true
 [submodule "src/doc/embedded-book"]
 	path = src/doc/embedded-book
diff --git a/src/llvm-project b/src/llvm-project
index 700fbf978e6..9ea7f739f25 160000
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit 700fbf978e6c5bb297d12963206f7487722de480
+Subproject commit 9ea7f739f257b049a65deeb1f2455bb2ea021cfa