diff --git a/ChangeLog b/ChangeLog
index ec41b0f..3773a5d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+ver 4.21:
+	Fix adapter initialization logic.
+	Fix adapter setup and start security manager early.
+	Fix usage issue with first_init variable.
+
 ver 4.20:
 	Cleanup session handling.
 	Cleanup mode setting handling.
diff --git a/configure.ac b/configure.ac
index ea1892d..ea0bd8a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 AC_PREREQ(2.50)
 AC_INIT()
 
-AM_INIT_AUTOMAKE(bluez, 4.20)
+AM_INIT_AUTOMAKE(bluez, 4.21)
 AM_CONFIG_HEADER(config.h)
 
 AM_MAINTAINER_MODE