VERSION bump to version 0.16.21
diff --git a/CMakeLists.txt b/CMakeLists.txt
index fc94352..19d9f07 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,7 +12,7 @@
 # set version
 set(LIBYANG_MAJOR_VERSION 0)
 set(LIBYANG_MINOR_VERSION 16)
-set(LIBYANG_MICRO_VERSION 20)
+set(LIBYANG_MICRO_VERSION 21)
 set(LIBYANG_VERSION ${LIBYANG_MAJOR_VERSION}.${LIBYANG_MINOR_VERSION}.${LIBYANG_MICRO_VERSION})
 set(LIBYANG_SOVERSION ${LIBYANG_MAJOR_VERSION}.${LIBYANG_MINOR_VERSION})