diff --git a/pkgs/development/libraries/libsigcxx/default.nix b/pkgs/development/libraries/libsigcxx/default.nix
index b5919d62d448..3afb588af1b1 100644
--- a/pkgs/development/libraries/libsigcxx/default.nix
+++ b/pkgs/development/libraries/libsigcxx/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   pname = "libsigc++";
-  version = "2.10.8";
+  version = "2.12.1";
 
   src = fetchurl {
     url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    sha256 = "sha256-I1pAvsc0bHuCtqjKrgRWNT3AbnHxS8QUvMhYrxg4cZo=";
+    sha256 = "sha256-qdvuMjNR0Qm3ruB0qcuJyj57z4rY7e8YUfTPNZvVCEM=";
   };
 
   nativeBuildInputs = [ pkg-config meson ninja ];