diff --git a/NEWS b/NEWS
index 5310a788..e36e6b4f 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,20 @@ vim: spelllang=en spell tw=78
 
 -------------------------------------------------------------------------------
 
+Changes in 1.6.4:
+
+* igc: Set RX descriptor writeback threshold to 1
+* Avoid rescan on non-responding slave
+* Do not touch AL state of EoE slaves
+* Warn if FAKE_EC_NAME is not set
+* Added configuration switch to disable init.d files
+* Fixed FakeEtherCAT operation with muliple masters
+* Add UPDOWN_INTERFACES option to ethercat.conf
+* Improvements to the build system
+* Fix obsolete warnings on bootstrap
+* Explicitly check for pkg-config macros
+* Many documentation improvements (thanks to Nicola Fontana)
+
 Changes in 1.6.3:
 
 * Fix ccat for aarch64 >= 6.11.0
diff --git a/configure.ac b/configure.ac
index 4e50ca98..abea7e06 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,7 +30,7 @@ AC_PREREQ(2.59)
 # - Update version number below
 # - make dist-bzip2
 #
-AC_INIT([ethercat],[1.6.3],[fp@igh.de])
+AC_INIT([ethercat],[1.6.4],[fp@igh.de])
 AC_CONFIG_AUX_DIR([autoconf])
 AM_INIT_AUTOMAKE([-Wall -Wno-override -Werror dist-bzip2 subdir-objects foreign])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])