diff --git a/pkgs/development/compilers/llvm/18/default.nix b/pkgs/development/compilers/llvm/18/default.nix
index ea5323db9b0f..3c0e551791e5 100644
--- a/pkgs/development/compilers/llvm/18/default.nix
+++ b/pkgs/development/compilers/llvm/18/default.nix
@@ -25,7 +25,7 @@
   #   rev-version = /* human readable version; i.e. "unstable-2022-26-07" */;
   #   sha256 = /* checksum for this release, can omit if specifying your own `monorepoSrc` */;
   # }
-, officialRelease ? { version = "18.1.4"; sha256 = "sha256-LyQEb4ZJXm2hkPOM9XITIploMT2VKIQWxUFio7SXrc0="; }
+, officialRelease ? { version = "18.1.5"; sha256 = "0n44chqn96xsa00ryhwk8g0vv3zx908xjakkgjsa14sjr9mcsq8q"; }
   # i.e.:
   # {
   #   version = /* i.e. "15.0.0" */;