diff --git a/pkgs/development/libraries/libpng/default.nix b/pkgs/development/libraries/libpng/default.nix
index 17820fa8188..53777a0c56f 100644
--- a/pkgs/development/libraries/libpng/default.nix
+++ b/pkgs/development/libraries/libpng/default.nix
@@ -1,13 +1,13 @@
-{ stdenv, fetchurl, zlib, apngSupport ? false }:
+{ stdenv, fetchurl, zlib, apngSupport ? true }:
 
 assert zlib != null;
 
 let
-  version = "1.6.16";
-  sha256 = "0q5ygy15jkpqbj5701ywrjzqp4nl5yz3r4g58h2p0kiycggm9xs2";
+  version = "1.6.18";
+  sha256 = "0qq96rf31483kxz32h6l6921hy6p2v2pfqfvc74km229g4xw241f";
   patch_src = fetchurl {
     url = "mirror://sourceforge/libpng-apng/libpng-${version}-apng.patch.gz";
-    sha256 = "1sf27a5gvwvcm4wsf2pyq87d3g4l2fym8cirq9sli54bi753ikbh";
+    sha256 = "0g2ljh2vhclas1hacys1c4gk6l6hyy6sngb2yvdsnjz50nyq16kv";
   };
   whenPatched = stdenv.lib.optionalString apngSupport;