diff --git a/pkgs/development/libraries/libpng/default.nix b/pkgs/development/libraries/libpng/default.nix
index d6a03867000b..f7e71d872ca0 100644
--- a/pkgs/development/libraries/libpng/default.nix
+++ b/pkgs/development/libraries/libpng/default.nix
@@ -10,21 +10,21 @@
 assert zlib != null;
 
 let
-  patchVersion = "1.6.49";
+  patchVersion = "1.6.50";
   patch_src = fetchurl {
     url = "mirror://sourceforge/libpng-apng/libpng-${patchVersion}-apng.patch.gz";
-    hash = "sha256-Zmdtgn4y7hc0ezmjU+kbW4sFR7RArrE/AjzU+irXjTI=";
+    hash = "sha256-aH3cDHyxKKPqWOFZtRKSUlN8J+3gwyqT8R8DEn8MAWU=";
   };
   whenPatched = lib.optionalString apngSupport;
 
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "libpng" + whenPatched "-apng";
-  version = "1.6.49";
+  version = "1.6.50";
 
   src = fetchurl {
     url = "mirror://sourceforge/libpng/libpng-${finalAttrs.version}.tar.xz";
-    hash = "sha256-QxgqpI451ksatOxrcas+kQtn7tOg//N3fPjPQNbvcCQ=";
+    hash = "sha256-TfOWUYYgp6o2UUQ+h9Gyhi5OiMrRNai5NCPgFwYjIwc=";
   };
   postPatch =
     whenPatched "gunzip < ${patch_src} | patch -Np1"