diff --git a/pkgs/development/libraries/libpng/12.nix b/pkgs/development/libraries/libpng/12.nix
index d2fa6b184d6..7ae3d0e1d68 100644
--- a/pkgs/development/libraries/libpng/12.nix
+++ b/pkgs/development/libraries/libpng/12.nix
@@ -3,11 +3,11 @@
 assert !(stdenv ? cross) -> zlib != null;
 
 stdenv.mkDerivation rec {
-  name = "libpng-1.2.54";
+  name = "libpng-1.2.55";
 
   src = fetchurl {
     url = "mirror://sourceforge/libpng/${name}.tar.xz";
-    sha256 = "0wnjy7gqn0f24qrlggs7kl0ij59by413j1xmqp12n3vqh9j531fg";
+    sha256 = "0zkra0b9lrpk2axassdgkqinmc2ba6b473sm52xbpyknaqs2fljy";
   };
 
   propagatedBuildInputs = [ zlib ];