diff --git a/libpng-1.6.3.tar.xz b/libpng-1.6.3.tar.xz
deleted file mode 100644
index c8690eb..0000000
--- a/libpng-1.6.3.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
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deleted file mode 100644
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diff --git a/libpng-1.6.4.tar.xz b/libpng-1.6.4.tar.xz
new file mode 100644
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--- /dev/null
+++ b/libpng-1.6.4.tar.xz
@@ -0,0 +1,3 @@
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+oid sha256:cfab4fcc1bae75dba5852b4014f1ae3d1ca0564b97208bbbfa50e041bc55f896
+size 868812
diff --git a/libpng-1.6.4.tar.xz.asc b/libpng-1.6.4.tar.xz.asc
new file mode 100644
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--- /dev/null
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diff --git a/libpng16.changes b/libpng16.changes
index 32c1e3e..6db07b4 100644
--- a/libpng16.changes
+++ b/libpng16.changes
@@ -1,3 +1,14 @@
+-------------------------------------------------------------------
+Thu Sep 12 13:21:53 UTC 2013 - pgajdos@suse.com
+
+- updated to 1.6.4:
+  * Added information about png_set_options() to the manual.
+  * Delay calling png_init_filter_functions() until a row with nonzero 
+    filter is found.
+  * Fixed inconsistent conditional compilation of 
+    png_chunk_unknown_handling() prototype, definition, and usage.  
+    Made it depend on PNG_HANDLE_AS_UNKNOWN_SUPPORTED everywhere.
+
 -------------------------------------------------------------------
 Fri Aug 30 14:08:02 UTC 2013 - coolo@suse.com
 
diff --git a/libpng16.spec b/libpng16.spec
index b3b7e81..e44ec1b 100644
--- a/libpng16.spec
+++ b/libpng16.spec
@@ -19,7 +19,7 @@
 #
 %define major   1
 %define minor   6
-%define micro   3
+%define micro   4
 %define branch  %{major}%{minor}
 %define libname libpng%{branch}-%{branch}