diff --git a/ChangeLog b/ChangeLog
index 02b7d18d..1f823b11 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,9 @@
 pkcs11-helper
 Copyright (c) 2005-2020 Alon Bar-Lev <alon.barlev@gmail.com>
 
+????-??-?? - Version 1.28
+
+
 2020-11-17 - Version 1.27
 
 * core: handle PIN expiration after C_Login as C_Login may take a while
diff --git a/configure.ac b/configure.ac
index 7b4ed715..0f63abd6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -51,9 +51,9 @@
 AC_PREREQ(2.60)
 
 define([PACKAGE_VERSION_MAJOR], [1])
-define([PACKAGE_VERSION_MINOR], [27])
+define([PACKAGE_VERSION_MINOR], [28])
 define([PACKAGE_VERSION_FIX], [0])
-define([PACKAGE_SUFFIX], [])
+define([PACKAGE_SUFFIX], [_master])
 
 AC_INIT([pkcs11-helper],[PACKAGE_VERSION_MAJOR.PACKAGE_VERSION_MINOR.PACKAGE_VERSION_FIX[]PACKAGE_SUFFIX])
 AC_CONFIG_AUX_DIR([.])