diff --git a/docs.doxygen b/docs.doxygen
index 8af2ccc1..9179cac1 100644
--- a/docs.doxygen
+++ b/docs.doxygen
@@ -38,7 +38,7 @@ PROJECT_NAME           = "Cytnx"
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = "v0.9.3"
+PROJECT_NUMBER         = "v0.9.4"
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a
diff --git a/version.cmake b/version.cmake
index 215f669d..e1634ece 100644
--- a/version.cmake
+++ b/version.cmake
@@ -1,3 +1,3 @@
 set(CYTNX_VERSION_MAJOR 0)
 set(CYTNX_VERSION_MINOR 9)
-set(CYTNX_VERSION_PATCH 3)
+set(CYTNX_VERSION_PATCH 4)