diff --git a/build-llvm.sh b/build-llvm.sh
index d4d3d92..0252eed 100755
--- a/build-llvm.sh
+++ b/build-llvm.sh
@@ -16,7 +16,7 @@
 
 set -e
 
-: ${LLVM_VERSION:=llvmorg-21.1.4}
+: ${LLVM_VERSION:=llvmorg-21.1.5}
 ASSERTS=OFF
 unset HOST
 BUILDDIR="build"