diff --git a/pkgs/os-specific/linux/cifs-utils/default.nix b/pkgs/os-specific/linux/cifs-utils/default.nix
index f69319b52569..08c6d997795f 100644
--- a/pkgs/os-specific/linux/cifs-utils/default.nix
+++ b/pkgs/os-specific/linux/cifs-utils/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "cifs-utils-${version}";
-  version = "6.5";
+  version = "6.6";
 
   src = fetchurl {
     url = "mirror://samba/pub/linux-cifs/cifs-utils/${name}.tar.bz2";
-    sha256 = "1xs9rwqfpx8qj5mcmagw6y1hzwc71zhzb5r8hv06sz16p1w6axz2";
+    sha256 = "09biws1jm23l3mjb9kh99v57z8bgzybrmimwddb40s6y0yl54wfh";
   };
 
   buildInputs = [ kerberos keyutils pam talloc ];