diff --git a/libs/libzrtp/configure.in b/libs/libzrtp/configure.in
index 34feb59a91..f95cf8d4f5 100644
--- a/libs/libzrtp/configure.in
+++ b/libs/libzrtp/configure.in
@@ -32,7 +32,7 @@ case $target_os in
 esac
 
 
-AM_INIT_AUTOMAKE([libzrtp], [1.15])
+AM_INIT_AUTOMAKE([libzrtp], [1.20])
 AX_PREFIX_CONFIG_H(include/zrtp_config_unix.h,ZRTP,config/config.h)
 
 CFLAGS="$CFLAGS -Wno-unused-parameter -fno-strict-aliasing -fPIC -DZRTP_AUTOMAKE=1"
diff --git a/libs/libzrtp/doc/manuals/changelog.dox b/libs/libzrtp/doc/manuals/changelog.dox
index 854278bc0e..6686515851 100644
--- a/libs/libzrtp/doc/manuals/changelog.dox
+++ b/libs/libzrtp/doc/manuals/changelog.dox
@@ -13,6 +13,29 @@
 /*!
 \page changelog ChangeLog
 
+****************************************************************************************************
+\section v120 libzrtp v1.20 build XXX (ZRTP RFC 6189, protocol 1.1)
+****************************************************************************************************
+
+<b>This release is focused</b> on better ZRTP cache management. 
+
+***\subsection v120_changes API changes and Upgrade Instructions:
+  *- Starting from v120 libzrtp uses global ZID for all outgoing connections. Local ZID should be
+    specified in zrtp_global_t#zid and provided to zrtp_init(). App doesn't need to pass local ZID 
+    each time it creates new session via zrtp_session_init().    
+  *- Added zrtp_randstr2() which allow to generate random string before libzrtp being initialized.
+    Can be handy to generate initial ZID. In normal circumstances, use zrtp_randstr() whenever possible.
+  *- ZRTP cache API was completely redesigned. Look at zrtp_cache.h for more details.  
+  
+
+***\subsection v120_feature New features and improvements.
+  *- new better cache management API.
+
+***\subsection v120_bugs Bug fixes
+  *- fixed bug when ZRTP forces enrolled endpoints to re-render SAS when sashash is empty.
+  *- other minor bug fixes and improvements
+
+
 ****************************************************************************************************
 \section v091 DEVELOPERS BUILD Release Notes - libzrtp - Version 0.91 build XXX (ZRTP ID v16x, protocol 1.X)
 ****************************************************************************************************
@@ -194,4 +217,5 @@ Minor improvements. Zfone and libZRTP projects moved to public bug-tracking and
     
     *- [LZRTP-132] <b>Replace HMAC with KDF function call.</b>\n
 	Since ZRTP draft 12b defines ZRTP KDF to be in compliance with the recommendations in NIST SP 800-108. KDF function implemented as _zrtp_kdf() in zrtp_utils_proto.c. All KDF operations were replaced with from hmac to kdf function.	
+
 */
diff --git a/libs/libzrtp/include/zrtp_version.h b/libs/libzrtp/include/zrtp_version.h
index 3b4dfcb97f..fc0a349442 100644
--- a/libs/libzrtp/include/zrtp_version.h
+++ b/libs/libzrtp/include/zrtp_version.h
@@ -12,8 +12,8 @@
 
 #define LIBZRTP_VERSION_MAJOR		1
 
-#define LIBZRTP_VERSION_MINOR		15
-#define LIBZRTP_VERSION_BUILD		611
-#define LIBZRTP_VERSION_STR			"v1.15 611"
+#define LIBZRTP_VERSION_MINOR		20
+#define LIBZRTP_VERSION_BUILD		616
+#define LIBZRTP_VERSION_STR			"v1.20 616"
 
 #endif /*__ZRTP_VERSION_H__*/