diff --git a/ANNOUNCE b/ANNOUNCE
index f6bd771..8b510ab 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,36 +1,32 @@
-Libpng 1.6.33rc02 - September 23, 2017
+Libpng 1.6.33 - September 28, 2017
 
-This is not intended to be a public release. It will be replaced
-within a few weeks by a public version or by another test version.
+This is a public release of libpng, intended for use in production codes.
 
 Files available for download:
 
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.6.33rc02.tar.xz (LZMA-compressed, recommended)
-   1.6.33rc02.tar.gz
+   libpng-1.6.33.tar.xz (LZMA-compressed, recommended)
+   libpng-1.6.33.tar.gz
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp1633r02.7z  (LZMA-compressed, recommended)
-   lp1633r02.zip
+   lpng1633.7z  (LZMA-compressed, recommended)
+   lpng1633.zip
 
 Other information:
 
-   1.6.33rc02-README.txt
-   1.6.33rc02-LICENSE.txt
-   libpng-1.6.33rc02-*.asc (armored detached GPG signatures)
+   libpng-1.6.33-README.txt
+   libpng-1.6.33-LICENSE.txt
+   libpng-1.6.33-*.asc (armored detached GPG signatures)
 
 Changes since the last public release (1.6.32):
-Version 1.6.33beta01 [August 28, 2017]
   Added PNGMINUS_UNUSED macro to contrib/pngminus/p*.c and added missing
     parenthesis in contrib/pngminus/pnm2png.c (bug report by Christian Hesse).
   Fixed off-by-one error in png_do_check_palette_indexes() (Bug report
     by Mick P., Source Forge Issue #269).
-
-Version 1.6.33beta02 [September 3, 2017]
   Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc
     to fix shortlived oss-fuzz issue 3234.
   Compute a larger limit on IDAT because some applications write a deflate
@@ -38,15 +34,11 @@
   Use current date (DATE) instead of release-date (RDATE) in last
     changed date of contrib/oss-fuzz files.
   Enabled ARM support in CMakeLists.txt (Bernd Kuhls).
-
-Version 1.6.33beta03 [September 14, 2017]
   Fixed incorrect typecast of some arguments to png_malloc() and
     png_calloc() that were png_uint_32 instead of png_alloc_size_t
     (Bug report by "irwir" in Github libpng issue #175).
   Use pnglibconf.h.prebuilt when building for ANDROID with cmake (Github
     issue 162, by rcdailey).
-
-Version 1.6.33rc01 [September 20, 2017]
   Initialize memory allocated by png_inflate to zero, using memset, to
     stop an oss-fuzz "use of uninitialized value" detection in png_set_text_2()
     due to truncated iTXt or zTXt chunk.
@@ -54,13 +46,14 @@
     stop an oss-fuzz "use of uninitialized value" detection in
     png_icc_check_tag_table() due to truncated iCCP chunk.
   Removed a redundant test (suggested by "irwir" in Github issue #180).
-
-Version 1.6.33rc02 [September 23, 2017]
   Added an interlaced version of each file in contrib/pngsuite.
   Relocate new memset() call in pngrutil.c.
   Removed more redundant tests (suggested by "irwir" in Github issue #180).
   Add support for loading images with associated alpha in the Simplified
     API (Samuel Williams).
+  Revert contrib/oss-fuzz/libpng_read_fuzzer.cc to libpng-1.6.32 state.
+  Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc
+  Add end_info structure and png_read_end() to the libpng fuzzer.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 8743361..4238bf0 100644
--- a/CHANGES
+++ b/CHANGES
@@ -6032,6 +6032,11 @@
   Add support for loading images with associated alpha in the Simplified
     API (Samuel Williams).
 
+Version 1.6.33 [September 28, 2017]
+  Revert contrib/oss-fuzz/libpng_read_fuzzer.cc to libpng-1.6.32 state.
+  Initialize png_handler.row_ptr in contrib/oss-fuzz/libpng_read_fuzzer.cc
+  Add end_info structure and png_read_end() to the libpng fuzzer.
+
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b962792..4fcbc35 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -844,7 +844,7 @@
 # SET UP LINKS
 if(PNG_SHARED)
   set_target_properties(png PROPERTIES
-#   VERSION 16.${PNGLIB_RELEASE}.1.6.33rc02
+#   VERSION 16.${PNGLIB_RELEASE}.1.6.33
     VERSION 16.${PNGLIB_RELEASE}.0
     SOVERSION 16
     CLEAN_DIRECT_OUTPUT 1)
diff --git a/LICENSE b/LICENSE
index 1b975a9..57c366f 100644
--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.0.7, July 1, 2000 through 1.6.33rc02, September 23, 2017 are
+libpng versions 1.0.7, July 1, 2000 through 1.6.33, September 28, 2017 are
 Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
 derived from libpng-1.0.6, and are distributed according to the same
 disclaimer and license as libpng-1.0.6 with the following individuals
@@ -130,4 +130,4 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-September 23, 2017
+September 28, 2017
diff --git a/README b/README
index 19d5ea0..0f03aa6 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.6.33rc02 - September 23, 2017 (shared library 16.0)
+README for libpng version 1.6.33 - September 28, 2017 (shared library 16.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
diff --git a/configure.ac b/configure.ac
index 5c18137..9bb5053 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,7 +25,7 @@
 
 dnl Version number stuff here:
 
-AC_INIT([libpng],[1.6.33rc02],[png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng],[1.6.33],[png-mng-implement@lists.sourceforge.net])
 AC_CONFIG_MACRO_DIR([scripts])
 
 # libpng does not follow GNU file name conventions (hence 'foreign')
@@ -46,7 +46,7 @@
 dnl AM_PREREQ([1.11.2])
 dnl stop configure from automagically running automake
 
-PNGLIB_VERSION=1.6.33rc02
+PNGLIB_VERSION=1.6.33
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=6
 PNGLIB_RELEASE=33
diff --git a/contrib/oss-fuzz/README.txt b/contrib/oss-fuzz/README.txt
index 7e1c4c8..a2b6736 100644
--- a/contrib/oss-fuzz/README.txt
+++ b/contrib/oss-fuzz/README.txt
@@ -1,4 +1,4 @@
-Last changed in libpng 1.6.33 [(PENDING RELEASE)]
+Last changed in libpng 1.6.33 [September 28, 2017]
 Copyright (c) 2017 Glenn Randers-Pehrson
 
 This code is released under the libpng license.
diff --git a/contrib/oss-fuzz/build.sh b/contrib/oss-fuzz/build.sh
index dad704f..d2137b1 100755
--- a/contrib/oss-fuzz/build.sh
+++ b/contrib/oss-fuzz/build.sh
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-# Last changed in libpng 1.6.33 [(PENDING RELEASE)]
+# Last changed in libpng 1.6.33 [September 28, 2017]
 #
 # Revisions by Glenn Randers-Pehson, 2017:
 # 1. Build only the library, not the tools (changed "make -j$(nproc) all" to
@@ -37,13 +37,13 @@
 make -j$(nproc) libpng16.la
 
 # build libpng_read_fuzzer.
-$CXX $CXXFLAGS -O0 -std=c++11 -I. \
+$CXX $CXXFLAGS -std=c++11 -I. \
      $SRC/libpng/contrib/oss-fuzz/libpng_read_fuzzer.cc \
      -o $OUT/libpng_read_fuzzer \
      -lFuzzingEngine .libs/libpng16.a -lz
 
 # add seed corpus.
-find $SRC/libpng -name "*.png" | \
+find $SRC/libpng -name "*.png" | grep -v crashers | \
      xargs zip $OUT/libpng_read_fuzzer_seed_corpus.zip
 
 cp $SRC/libpng/contrib/oss-fuzz/*.dict \
diff --git a/contrib/oss-fuzz/newcc b/contrib/oss-fuzz/newcc
new file mode 100644
index 0000000..0fc9e20
--- /dev/null
+++ b/contrib/oss-fuzz/newcc
@@ -0,0 +1,190 @@
+
+// libpng_read_fuzzer.cc
+// Copyright 2017 Glenn Randers-Pehrson
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that may
+// be found in the LICENSE file https://cs.chromium.org/chromium/src/LICENSE
+
+// Last changed in libpng 1.6.33beta03 [September 27, 2017]
+
+// The modifications in 2017 by Glenn Randers-Pehrson include
+// 1. addition of a PNG_CLEANUP macro,
+// 2. setting the option to ignore ADLER32 checksums,
+// 3. adding "#include <string.h>" which is needed on some platforms
+//    to provide memcpy().
+// 4. adding read_end_info() and creating an end_info structure.
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <vector>
+
+#define PNG_INTERNAL
+#include "png.h"
+
+struct BufState {
+  const uint8_t* data;
+  size_t bytes_left;
+};
+
+struct PngObjectHandler {
+  png_infop info_ptr = nullptr;
+  png_structp png_ptr = nullptr;
+  png_infop end_info_ptr = nullptr;
+  png_voidp row_ptr = nullptr;
+  BufState* buf_state = nullptr;
+
+  ~PngObjectHandler() {
+    if (row_ptr)
+      png_free(png_ptr, row_ptr);
+    if (end_info_ptr)
+      png_destroy_read_struct(&png_ptr, &info_ptr, &end_info_ptr);
+    else if (info_ptr) 
+      png_destroy_read_struct(&png_ptr, &info_ptr, nullptr);
+    else
+      png_destroy_read_struct(&png_ptr, nullptr, nullptr);
+    delete buf_state;
+  }
+};
+
+void user_read_data(png_structp png_ptr, png_bytep data, png_size_t length) {
+  BufState* buf_state = static_cast<BufState*>(png_get_io_ptr(png_ptr));
+  if (length > buf_state->bytes_left) {
+    png_error(png_ptr, "read error");
+  }
+  memcpy(data, buf_state->data, length);
+  buf_state->bytes_left -= length;
+  buf_state->data += length;
+}
+
+static const int kPngHeaderSize = 8;
+
+// Entry point for LibFuzzer.
+// Roughly follows the libpng book example:
+// http://www.libpng.org/pub/png/book/chapter13.html
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  if (size < kPngHeaderSize) {
+    return 0;
+  }
+
+  std::vector<unsigned char> v(data, data + size);
+  if (png_sig_cmp(v.data(), 0, kPngHeaderSize)) {
+    // not a PNG.
+    return 0;
+  }
+
+  PngObjectHandler png_handler;
+  png_handler.png_ptr = nullptr;
+  png_handler.row_ptr = nullptr;
+  png_handler.info_ptr = nullptr;
+  png_handler.end_info_ptr = nullptr;
+
+  png_handler.png_ptr = png_create_read_struct
+    (PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
+  if (!png_handler.png_ptr) {
+    return 0;
+  }
+
+#define PNG_CLEANUP \
+  if(png_handler.png_ptr) \
+  { \
+    if (png_handler.row_ptr) \
+      png_free(png_handler.png_ptr, png_handler.row_ptr); \
+    if (png_handler.end_info_ptr) \
+      png_destroy_read_struct(&png_handler.png_ptr, &png_handler.info_ptr,\
+        &png_handler.end_info_ptr); \
+    else if (png_handler.info_ptr) \
+      png_destroy_read_struct(&png_handler.png_ptr, &png_handler.info_ptr,\
+        nullptr); \
+    else \
+      png_destroy_read_struct(&png_handler.png_ptr, nullptr, nullptr); \
+    png_handler.png_ptr = nullptr; \
+    png_handler.row_ptr = nullptr; \
+    png_handler.info_ptr = nullptr; \
+    png_handler.end_info_ptr = nullptr; \
+  }
+
+  png_handler.info_ptr = png_create_info_struct(png_handler.png_ptr);
+  if (!png_handler.info_ptr) {
+    PNG_CLEANUP
+    return 0;
+  }
+
+  png_handler.end_info_ptr = png_create_info_struct(png_handler.png_ptr);
+  if (!png_handler.end_info_ptr) {
+    PNG_CLEANUP
+    return 0;
+  }
+
+  /* Treat benign errors as warnings */
+  png_set_benign_errors(png_handler.png_ptr, 1);
+
+  png_set_crc_action(png_handler.png_ptr, PNG_CRC_QUIET_USE, PNG_CRC_QUIET_USE);
+
+#ifdef PNG_IGNORE_ADLER32
+  png_set_option(png_handler.png_ptr, PNG_IGNORE_ADLER32, PNG_OPTION_ON);
+#endif
+
+  // Setting up reading from buffer.
+  png_handler.buf_state = new BufState();
+  png_handler.buf_state->data = data + kPngHeaderSize;
+  png_handler.buf_state->bytes_left = size - kPngHeaderSize;
+  png_set_read_fn(png_handler.png_ptr, png_handler.buf_state, user_read_data);
+  png_set_sig_bytes(png_handler.png_ptr, kPngHeaderSize);
+
+  if (setjmp(png_jmpbuf(png_handler.png_ptr))) {
+    PNG_CLEANUP
+    return 0;
+  }
+
+  // Reading.
+  png_read_info(png_handler.png_ptr, png_handler.info_ptr);
+  png_read_update_info(png_handler.png_ptr, png_handler.info_ptr);
+  png_handler.row_ptr = png_malloc(
+      png_handler.png_ptr, png_get_rowbytes(png_handler.png_ptr,
+                                               png_handler.info_ptr));
+
+  // reset error handler to put png_deleter into scope.
+  if (setjmp(png_jmpbuf(png_handler.png_ptr))) {
+    PNG_CLEANUP
+    return 0;
+  }
+
+  png_uint_32 width, height;
+  int bit_depth, color_type, interlace_type, compression_type;
+  int filter_type;
+
+  if (!png_get_IHDR(png_handler.png_ptr, png_handler.info_ptr, &width,
+                    &height, &bit_depth, &color_type, &interlace_type,
+                    &compression_type, &filter_type)) {
+    PNG_CLEANUP
+    return 0;
+  }
+
+  // This is going to be too slow.
+  if (width && height > 100000000 / width) {
+    PNG_CLEANUP
+    return 0;
+  }
+
+  int passes = png_set_interlace_handling(png_handler.png_ptr);
+  png_start_read_image(png_handler.png_ptr);
+
+  /* To do: prevent the optimizer from removing this code entirely */
+  for (int pass = 0; pass < passes; ++pass) {
+    for (png_uint_32 y = 0; y < height; ++y) {
+      png_read_row(png_handler.png_ptr,
+                   static_cast<png_bytep>(png_handler.row_ptr), nullptr);
+    }
+  }
+
+  png_read_end(png_handler.png_ptr, png_handler.end_info_ptr);
+
+  PNG_CLEANUP
+
+  /* TO do: exercise the progressive reader here */
+
+  return 0;
+}
diff --git a/libpng-manual.txt b/libpng-manual.txt
index e306978..d5cfe97 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -1,6 +1,6 @@
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.6.33rc02 - September 23, 2017
+ libpng version 1.6.33 - September 28, 2017
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.6.33rc02 - September 23, 2017
+ libpng versions 0.97, January 1998, through 1.6.33 - September 28, 2017
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2017 Glenn Randers-Pehrson
 
@@ -5414,7 +5414,7 @@
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.6.33rc02 are Y2K compliant.  It is my belief that earlier
+upward through 1.6.33 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has two year fields.  One is a 2-byte unsigned integer
diff --git a/libpng.3 b/libpng.3
index 8ee0d4b..03f9282 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "September 23, 2017"
+.TH LIBPNG 3 "September 28, 2017"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.33rc02
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.33
 .SH SYNOPSIS
 \fB
 #include <png.h>\fP
@@ -518,7 +518,7 @@
 .SH LIBPNG.TXT
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.6.33rc02 - September 23, 2017
+ libpng version 1.6.33 - September 28, 2017
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -529,7 +529,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.6.33rc02 - September 23, 2017
+ libpng versions 0.97, January 1998, through 1.6.33 - September 28, 2017
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2017 Glenn Randers-Pehrson
 
@@ -5932,7 +5932,7 @@
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.6.33rc02 are Y2K compliant.  It is my belief that earlier
+upward through 1.6.33 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has two year fields.  One is a 2-byte unsigned integer
@@ -6090,7 +6090,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.6.33rc02 - September 23, 2017:
+Libpng version 1.6.33 - September 28, 2017:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -6115,7 +6115,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.0.7, July 1, 2000 through 1.6.33rc02, September 23, 2017 are
+libpng versions 1.0.7, July 1, 2000 through 1.6.33, September 28, 2017 are
 Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
 derived from libpng-1.0.6, and are distributed according to the same
 disclaimer and license as libpng-1.0.6 with the following individuals
@@ -6243,7 +6243,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-September 23, 2017
+September 28, 2017
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index f78adb1..03b7f60 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
 .TH LIBPNGPF 3 "April 1, 2017"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.33rc02
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.33
 (private functions)
 .SH SYNOPSIS
 \fB\fB#include \fI\fI"pngpriv.h"
diff --git a/png.c b/png.c
index 8b06b5c..5513472 100644
--- a/png.c
+++ b/png.c
@@ -1,7 +1,7 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.6.33 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.33 [September 28, 2017]
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -14,7 +14,7 @@
 #include "pngpriv.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_33rc02 Your_png_h_is_not_version_1_6_33rc02;
+typedef png_libpng_version_1_6_33 Your_png_h_is_not_version_1_6_33;
 
 #ifdef __GNUC__
 /* The version tests may need to be added to, but the problem warning has
@@ -816,14 +816,14 @@
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-      "libpng version 1.6.33rc02 - September 23, 2017" PNG_STRING_NEWLINE \
+      "libpng version 1.6.33 - September 28, 2017" PNG_STRING_NEWLINE \
       "Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson" \
       PNG_STRING_NEWLINE \
       "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
       "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
       PNG_STRING_NEWLINE;
 #  else
-   return "libpng version 1.6.33rc02 - September 23, 2017\
+   return "libpng version 1.6.33 - September 28, 2017\
       Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
diff --git a/png.h b/png.h
index 5e828e3..a5f142b 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.6.33rc02, September 23, 2017
+ * libpng version 1.6.33, September 28, 2017
  *
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -12,7 +12,7 @@
  * Authors and maintainers:
  *   libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *   libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
- *   libpng versions 0.97, January 1998, through 1.6.33rc02, September 23, 2017:
+ *   libpng versions 0.97, January 1998, through 1.6.33, September 28, 2017:
  *     Glenn Randers-Pehrson.
  *   See also "Contributing Authors", below.
  */
@@ -25,7 +25,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.0.7, July 1, 2000 through 1.6.33rc02, September 23, 2017 are
+ * libpng versions 1.0.7, July 1, 2000 through 1.6.33, September 28, 2017 are
  * Copyright (c) 2000-2002, 2004, 2006-2017 Glenn Randers-Pehrson, are
  * derived from libpng-1.0.6, and are distributed according to the same
  * disclaimer and license as libpng-1.0.6 with the following individuals
@@ -241,13 +241,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    September 23, 2017
+ *    September 28, 2017
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.6.33rc02 are Y2K compliant.  It is my belief that
+ *    upward through 1.6.33 are Y2K compliant.  It is my belief that
  *    earlier versions were also Y2K compliant.
  *
  *    Libpng only has two year fields.  One is a 2-byte unsigned integer
@@ -309,8 +309,8 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.6.33rc02"
-#define PNG_HEADER_VERSION_STRING " libpng version 1.6.33rc02 - September 23, 2017\n"
+#define PNG_LIBPNG_VER_STRING "1.6.33"
+#define PNG_HEADER_VERSION_STRING " libpng version 1.6.33 - September 28, 2017\n"
 
 #define PNG_LIBPNG_VER_SONUM   16
 #define PNG_LIBPNG_VER_DLLNUM  16
@@ -324,7 +324,7 @@
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
  */
 
-#define PNG_LIBPNG_VER_BUILD  02
+#define PNG_LIBPNG_VER_BUILD  0
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -341,7 +341,7 @@
 #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
                                        PNG_LIBPNG_BUILD_PRIVATE */
 
-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_RC
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE
 
 /* Careful here.  At one time, Guy wanted to use 082, but that would be octal.
  * We must not include leading zeros.
@@ -459,7 +459,7 @@
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef char* png_libpng_version_1_6_33rc02;
+typedef char* png_libpng_version_1_6_33;
 
 /* Basic control structions.  Read libpng-manual.txt or libpng.3 for more info.
  *
diff --git a/pngconf.h b/pngconf.h
index 8eee512..e99e827 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.6.33rc02, September 23, 2017
+ * libpng version 1.6.33, September 28, 2017
  *
  * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngread.c b/pngread.c
index eaf4e0d..da32e9a 100644
--- a/pngread.c
+++ b/pngread.c
@@ -1,7 +1,7 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.6.33 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.33 [September 28, 2017]
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
diff --git a/pngrtran.c b/pngrtran.c
index 058a91d..c189650 100644
--- a/pngrtran.c
+++ b/pngrtran.c
@@ -1,7 +1,7 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * Last changed in libpng 1.6.33 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.33 [September 28, 2017]
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
diff --git a/pngrutil.c b/pngrutil.c
index 867bc65..8692933 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,7 +1,7 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.6.33 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.33 [September 28, 2017]
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
diff --git a/pngtest.c b/pngtest.c
index 69ea411..d91fee1 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -2153,4 +2153,4 @@
 #endif
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_33rc02 Your_png_h_is_not_version_1_6_33rc02;
+typedef png_libpng_version_1_6_33 Your_png_h_is_not_version_1_6_33;
diff --git a/pngtrans.c b/pngtrans.c
index 191ec4d..6882f0f 100644
--- a/pngtrans.c
+++ b/pngtrans.c
@@ -1,7 +1,7 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * Last changed in libpng 1.6.33 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.33 [September 28, 2017]
  * Copyright (c) 1998-2002,2004,2006-2017 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
diff --git a/projects/vstudio/README.txt b/projects/vstudio/README.txt
index 7403a33..3e2c37d 100644
--- a/projects/vstudio/README.txt
+++ b/projects/vstudio/README.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.6.33rc02 - September 23, 2017
+libpng version 1.6.33 - September 28, 2017
 
 Copyright (c) 2010,2013,2015 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index 5aefa56..b794131 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.6.33rc02 - September 23, 2017
+ * libpng version 1.6.33 - September 28, 2017
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index 220c037..fe560b4 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,11 +1,11 @@
 
-Makefiles for  libpng version 1.6.33rc02 - September 23, 2017
+Makefiles for  libpng version 1.6.33 - September 28, 2017
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng16.so.16.1.6.33rc02)
+                       (gcc, creates libpng16.so.16.1.6.33)
  makefile.linux-opt=>  Linux/ELF makefile with hardware optimizations on
-                       (gcc, creates libpng16.so.16.1.6.33rc02)
+                       (gcc, creates libpng16.so.16.1.6.33)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
                        ansi2knr (Requires ansi2knr.c from
@@ -35,12 +35,12 @@
  makefile.os2      =>  OS/2 Makefile (gcc and emx, requires libpng.def)
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng16.so.16.1.6.33rc02)
+                       creates libpng16.so.16.1.6.33)
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng16.so.16.1.6.33rc02)
+                       creates libpng16.so.16.1.6.33)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng16.so.16.1.6.33rc02)
+                       creates libpng16.so.16.1.6.33)
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
  makefile.sunos    =>  Sun makefile
  makefile.32sunu   =>  Sun Ultra 32-bit makefile
diff --git a/scripts/def.c b/scripts/def.c
index 71df176..d1a13cc 100644
--- a/scripts/def.c
+++ b/scripts/def.c
@@ -21,7 +21,7 @@
 PNG_DFN "OS2 CODE PRELOAD MOVEABLE DISCARDABLE"
 PNG_DFN ""
 PNG_DFN "EXPORTS"
-PNG_DFN ";Version 1.6.33rc02"
+PNG_DFN ";Version 1.6.33"
 
 #define PNG_EXPORTA(ordinal, type, name, args, attributes)\
         PNG_DFN "@" SYMBOL_PREFIX "@@" name "@"
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
index f851d49..733860d 100644
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.6.33rc02
+version=1.6.33
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index 686f45a..3854282 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.6.33rc02
+Version: 1.6.33
 Libs: -L${libdir} -lpng16
 Cflags: -I${includedir}
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index 19cc31f..b57c7bb 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@
 
 LIB=	png16
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.6.33rc02
+SHLIB_MINOR=	1.6.33
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
diff --git a/scripts/makefile.netbsd b/scripts/makefile.netbsd
index 9a0eca7..edc6ae6 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@
 
 LIB=	png
 SHLIB_MAJOR=	16
-SHLIB_MINOR=	1.6.33rc02
+SHLIB_MINOR=	1.6.33
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index 5e20e8b..ecde666 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	16
-SHLIB_MINOR=	1.6.33rc02
+SHLIB_MINOR=	1.6.33
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index 547ee76..cbf715d 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -1,8 +1,8 @@
-/* libpng 1.6.33rc02 STANDARD API DEFINITION */
+/* libpng 1.6.33 STANDARD API DEFINITION */
 
 /* pnglibconf.h - library build configuration */
 
-/* Libpng version 1.6.33rc02 - September 23, 2017 */
+/* Libpng version 1.6.33 - September 28, 2017 */
 
 /* Copyright (c) 1998-2017 Glenn Randers-Pehrson */
 
diff --git a/scripts/symbols.def b/scripts/symbols.def
index 9d587f2..7677d87 100644
--- a/scripts/symbols.def
+++ b/scripts/symbols.def
@@ -1,4 +1,4 @@
-;Version 1.6.33rc02
+;Version 1.6.33
 ;--------------------------------------------------------------
 ; LIBPNG symbol list as a Win32 DEF file
 ; Contains all the symbols that can be exported from libpng