diff --git a/src/version.h b/src/version.h
index dc0dbec20d..d0c5b1a966 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define LAMMPS_VERSION "21 May 2012"
+#define LAMMPS_VERSION "23 May 2012"