diff --git a/NEWS b/NEWS
index ac11504..4392f4c 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,10 @@
 News (mainly features/major bug fixes)
 
+portage-2.3.100
+--------------
+* New BINPKG_COMPRESS=zstd default (does not apply to installed systems
+  using the old bzip2 default).
+
 portage-2.3.97
 --------------
 * Support for the PORTAGE_LOG_FILTER_FILE_CMD variable has been
diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index b098089..cf4a04c 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -1,6 +1,15 @@
 Release Notes; upgrade information mainly.
 Features/major bugfixes are listed in NEWS
 
+portage-2.3.100
+==================================
+* Bug Fixes:
+    - Bug 715108 Change default BINPKG_COMPRESS to zstd
+    - Bug 719456 Add dependency on app-arch/zstd
+    - Bug 720866 Do not set PKG_CONFIG_PATH
+    - Bug 721402 Hostname UnicodeEncodeError surrogates not allowed
+    - Bug 721516 Suppress precompressed QA notice for docompress -x
+
 portage-2.3.99
 ==================================
 * Bug Fixes:
diff --git a/setup.py b/setup.py
index ed616f7..7d8cdcd 100755
--- a/setup.py
+++ b/setup.py
@@ -657,7 +657,7 @@
 
 setup(
 	name = 'portage',
-	version = '2.3.99',
+	version = '2.3.100',
 	url = 'https://wiki.gentoo.org/wiki/Project:Portage',
 	author = 'Gentoo Portage Development Team',
 	author_email = 'dev-portage@gentoo.org',