diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2dc4cba963f01..e6060bc279fd9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ project(taichi)
 
 SET(TI_VERSION_MAJOR 0)
 SET(TI_VERSION_MINOR 6)
-SET(TI_VERSION_PATCH 20)
+SET(TI_VERSION_PATCH 21)
 
 execute_process(
   WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
diff --git a/docs/version b/docs/version
index db94455307996..33ac52006e6b1 100644
--- a/docs/version
+++ b/docs/version
@@ -1 +1 @@
-0.6.20
+0.6.21