diff --git a/lib/memfs/version.rb b/lib/memfs/version.rb
index 5afc81f..2553015 100644
--- a/lib/memfs/version.rb
+++ b/lib/memfs/version.rb
@@ -1,3 +1,3 @@
 module MemFs
-  VERSION = '0.3.0'
+  VERSION = '0.4.0'
 end