diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3578280c..1c0be77a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -89,7 +89,7 @@ set(EVENT_ABI_LIBVERSION_AGE       0)
 # equals to RELEASE in Makefile.am
 set(EVENT_PACKAGE_RELEASE 2.2)
 
-set(EVENT_NUMERIC_VERSION 0x02020001)
+set(EVENT_NUMERIC_VERSION 0x02020100)
 
 # only a subset of names can be used, defaults to "beta"
 set(EVENT_STAGE_NAME ${EVENT_VERSION_STAGE})
diff --git a/Makefile.am b/Makefile.am
index 7e3acb0a..bf9cf14b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -70,7 +70,7 @@ VERSION_INFO = 1:0:0
 #  2.1.8-stable--     2.1        6:2:0 (ABI changed slightly)
 #
 # For Libevent 2.2:
-#  2.2.0-alpha --     2.2        1:0:0
+#  2.2.1-alpha --     2.2        1:0:0
 
 # ABI version history for this package effectively restarts every time
 # we change RELEASE.  Version 1.4.x had RELEASE of 1.4.
diff --git a/configure.ac b/configure.ac
index f2292386..1adf71f9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,7 +6,7 @@ dnl
 dnl Original version Dug Song <dugsong@monkey.org>
 
 AC_PREREQ([2.67])
-AC_INIT(libevent,2.2.0-alpha-dev)
+AC_INIT(libevent,2.2.1-alpha-dev)
 AC_CONFIG_SRCDIR(event.c)
 
 AC_CONFIG_MACRO_DIR([m4])
@@ -20,7 +20,7 @@ dnl make compilation quiet unless V=1 is used
 AM_SILENT_RULES([yes])
 
 AC_CONFIG_HEADERS(config.h  evconfig-private.h:evconfig-private.h.in)
-AC_DEFINE(NUMERIC_VERSION, 0x02020001, [Numeric representation of the version])
+AC_DEFINE(NUMERIC_VERSION, 0x02020100, [Numeric representation of the version])
 
 dnl Try and get a full POSIX environment on obscure systems
 AC_USE_SYSTEM_EXTENSIONS