diff --git a/pkgs/tools/graphics/optipng/default.nix b/pkgs/tools/graphics/optipng/default.nix
index 76305a343e6a..a7cb20ca1cf7 100644
--- a/pkgs/tools/graphics/optipng/default.nix
+++ b/pkgs/tools/graphics/optipng/default.nix
@@ -3,11 +3,11 @@
 # This package comes with its own copy of zlib, libpng and pngxtern
 
 stdenv.mkDerivation rec {
-  name = "optipng-0.6.4";
+  name = "optipng-0.6.5";
 
   src = fetchurl {
     url = "mirror://sourceforge/optipng/${name}.tar.gz";
-    sha256 = "0ivnm07zlww20i7dba0zk5dyg8f3hlj03j7vazq520r43lmqj01h";
+    sha256 = "0i2vpakj60bb0zgy4bynly2mwxiv5fq48yjqjzmrbnqwjh1y5619";
   };
 
   meta = {