diff --git a/pkgs/development/libraries/libytnef/default.nix b/pkgs/development/libraries/libytnef/default.nix
index a4f358fa546..59d4a8ce09e 100644
--- a/pkgs/development/libraries/libytnef/default.nix
+++ b/pkgs/development/libraries/libytnef/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "libytnef";
-  version = "2.0";
+  version = "2.1.1";
 
   src = fetchFromGitHub {
     owner = "Yeraze";
     repo = "ytnef";
     rev = "v${version}";
-    sha256 = "sha256-P5eTH5pKK+v4LCMAe6JbEbTYOJypmLMYVDYk5tGVZ14=";
+    sha256 = "sha256-VlgvbU8yNHyVRKqaNqqCpLBsndltfAk33BuzvFuViqU=";
   };
 
   nativeBuildInputs = [ autoreconfHook ];