diff --git a/ext/stringio/stringio.c b/ext/stringio/stringio.c
index 4dd5fb416a..c8057eefb5 100644
--- a/ext/stringio/stringio.c
+++ b/ext/stringio/stringio.c
@@ -11,7 +11,7 @@
 
 **********************************************************************/
 
-#define STRINGIO_VERSION "0.0.3"
+#define STRINGIO_VERSION "0.1.0"
 
 #include "ruby.h"
 #include "ruby/io.h"