diff --git a/pkgs/by-name/le/lessc/package.nix b/pkgs/by-name/le/lessc/package.nix
index 3d802d510a13..cd2909a92b20 100644
--- a/pkgs/by-name/le/lessc/package.nix
+++ b/pkgs/by-name/le/lessc/package.nix
@@ -16,13 +16,13 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "lessc";
-  version = "4.9.0";
+  version = "4.9.1";
 
   src = fetchFromGitHub {
     owner = "less";
     repo = "less.js";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-VP2W0aU1ml+wO5aGVeLP7vAaBXB5xIJ0ko3+l4lAOBg=";
+    hash = "sha256-kRhXqmClUyz+W42qXaeBZ2rJXyjZbYl+sxqLGOg5I3Q=";
   };
 
   pnpmDeps = fetchPnpmDeps {