diff --git a/ChangeLog b/ChangeLog
index c923ca1..7f44f04 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+version 0.9.4
+
+	* add proper memory fences.
+
 version 0.9.3
 
 	* enhances STATS to include the number of connections.
diff --git a/src/constants.hpp b/src/constants.hpp
index 03d865c..6cc00b7 100644
--- a/src/constants.hpp
+++ b/src/constants.hpp
@@ -29,7 +29,7 @@ const std::size_t   MAX_REQUEST_LENGTH  = 30 << 20; // 30 MiB
 const int           MAX_SLAVES          = 5;
 const int           MAX_CONSECUTIVE_GCS = 3;
 
-const char          VERSION[] = "yrmcds version 0.9.3";
+const char          VERSION[] = "yrmcds version 0.9.4";
 
 } // namespace yrmcds