diff --git a/llvm_version.cmake b/llvm_version.cmake
index 4d79b67..ce84532 100644
--- a/llvm_version.cmake
+++ b/llvm_version.cmake
@@ -1,2 +1,2 @@
-set(LLVM_VERSION 20.1.5)
-set(LLVM_SHA256 97025772b25c6694db049d3c4be5a72d926299aa1a9b861f490d66750e31c9dd)
\ No newline at end of file
+set(LLVM_VERSION 21.1.3)
+set(LLVM_SHA256 a70518c2d4c90b8b170732e1342a9854ec2babc310b41d5556a83f4b55a63d1d)