diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2f8a1cd..41e184e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,8 +1,8 @@
 cmake_minimum_required(VERSION 3.7)
 project(AnotherMemCheck)
 
-set(AnotherMemCheck_VERSION 1.0)
-set(AnotherMemCheck_SOVERSION 1)
+set(AnotherMemCheck_VERSION 2.0)
+set(AnotherMemCheck_SOVERSION 2)
 
 set(AnotherMemCheck_SOURCES
     "${CMAKE_CURRENT_SOURCE_DIR}/src/another_memcheck.cc"
diff --git a/Changelog.md b/Changelog.md
index 22ac23a..5b1c77a 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## Version 2.0
+
+Minor refactorings.
+
+Change internal implementation of linked list to be doubly-linked.
+
+Add support for calloc.
+
+Add pthreads to mutex-lock malloc/calloc/free.
+
 ## Version 1.0
 
 Initial version with working `AnotherMemCheck`.