diff --git a/pkgs/by-name/ss/ssdfs-utils/package.nix b/pkgs/by-name/ss/ssdfs-utils/package.nix
index 4ad02dbf5829..b2da6bde8bbc 100644
--- a/pkgs/by-name/ss/ssdfs-utils/package.nix
+++ b/pkgs/by-name/ss/ssdfs-utils/package.nix
@@ -13,13 +13,13 @@ stdenv.mkDerivation {
   # as ssdfs-utils, not ssdfs-tools.
   pname = "ssdfs-utils";
   # The version is taken from `configure.ac`, there are no tags.
-  version = "4.65";
+  version = "4.66";
 
   src = fetchFromGitHub {
     owner = "dubeyko";
     repo = "ssdfs-tools";
-    rev = "256c3415a580c2bec37f98bdc6d972c10454d627";
-    hash = "sha256-HGT7hBzsbtlBud4zwWZHDrQqzA1lmnNMrCZy5oylBSQ=";
+    rev = "ac59d21d78e40b760338eadb3b18f65274d63234";
+    hash = "sha256-F1cJAPMDw4iiNzNG4D9+z0esuu3cr45EyJYD3rmHmMM=";
   };
 
   strictDeps = true;