diff --git a/CMakeLists.txt b/CMakeLists.txt
index e62398e..de4fe45 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -67,7 +67,7 @@
 # set version of the library
 set(LIBYANG_MAJOR_SOVERSION 2)
 set(LIBYANG_MINOR_SOVERSION 8)
-set(LIBYANG_MICRO_SOVERSION 20)
+set(LIBYANG_MICRO_SOVERSION 21)
 set(LIBYANG_SOVERSION_FULL ${LIBYANG_MAJOR_SOVERSION}.${LIBYANG_MINOR_SOVERSION}.${LIBYANG_MICRO_SOVERSION})
 set(LIBYANG_SOVERSION ${LIBYANG_MAJOR_SOVERSION})