diff --git a/gpp-2.27.tar.bz2 b/gpp-2.27.tar.bz2
deleted file mode 100644
index 48ac788..0000000
--- a/gpp-2.27.tar.bz2
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:49eb99d22af991e7f4efe2b21baa1196e9ab98c05b4b7ed56524a612c47b8fd3
-size 140298
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deleted file mode 100644
index 968697e..0000000
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+++ /dev/null
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diff --git a/gpp-2.28.tar.bz2 b/gpp-2.28.tar.bz2
new file mode 100644
index 0000000..19b577c
--- /dev/null
+++ b/gpp-2.28.tar.bz2
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:343d33d562e2492ca9b51ff2cc4b06968a17a85fdc59d5d4e78eed3b1d854b70
+size 143337
diff --git a/gpp-2.28.tar.bz2.sig b/gpp-2.28.tar.bz2.sig
new file mode 100644
index 0000000..b68809a
--- /dev/null
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diff --git a/gpp.changes b/gpp.changes
index e356a5a..c08e33d 100644
--- a/gpp.changes
+++ b/gpp.changes
@@ -1,3 +1,12 @@
+-------------------------------------------------------------------
+Mon Oct 09 07:45:37 UTC 2023 - psychonaut@nothingisreal.com
+
+- update to GPP 2.28
+  * Fixed typos in documentation (Issues #57 and #61)
+  * Added #sinclude meta-macro for silent includes (Issue #63)
+  * requested inclusion in Leap 15.4 and 15.5; see
+    https://bugzilla.suse.com/show_bug.cgi?id=1108673
+
 -------------------------------------------------------------------
 Mon Jul 27 09:21:12 UTC 2020 - psychonaut@nothingisreal.com
 
@@ -15,7 +24,8 @@ Wed Jul 15 13:11:00 UTC 2020 - psychonaut@nothingisreal.com
   * Various minor fixes and revisions to the documentation
   * Added autoconf checks for popen() and pclose()
   * Moved the openSUSE-specific RPM spec file to a separate repository
-  * Avoided possibility of stack overflow during parsing (Issue #26)
+  * Avoided possibility of stack overflow during parsing (Issue #26;
+    CVE-2018-17076)
 - update keyring
 
 -------------------------------------------------------------------
diff --git a/gpp.spec b/gpp.spec
index 9321b8d..525ea33 100644
--- a/gpp.spec
+++ b/gpp.spec
@@ -2,7 +2,7 @@
 # spec file for package gpp
 #
 # Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
-# Copyright (c) 2017, 2020 Tristan Miller <psychonaut@nothingisreal.com>
+# Copyright (c) 2017-2023 Tristan Miller <psychonaut@nothingisreal.com>
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -18,7 +18,7 @@
 
 
 Name:           gpp
-Version:        2.27
+Version:        2.28
 Release:        0
 Summary:        Generic Preprocessor
 License:        LGPL-3.0+