diff --git a/CMakeLists.txt b/CMakeLists.txt
index f3c3a317..f811f31f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -142,8 +142,8 @@ if(NOT LIBTYPE)
 endif()
 
 set(LIB_MAJOR_VERSION "1")
-set(LIB_MINOR_VERSION "20")
-set(LIB_REVISION "1")
+set(LIB_MINOR_VERSION "21")
+set(LIB_REVISION "0")
 set(LIB_VERSION "${LIB_MAJOR_VERSION}.${LIB_MINOR_VERSION}.${LIB_REVISION}")
 set(LIB_VERSION_NUM ${LIB_MAJOR_VERSION},${LIB_MINOR_VERSION},${LIB_REVISION},0)
 
diff --git a/appveyor.yml b/appveyor.yml
index 9a137e9c..e54760b2 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: 1.20.1.{build}
+version: 1.21.0.{build}
 
 environment:
     APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017