diff --git a/src/version.h b/src/version.h
index 080b43a866..110bee8220 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define LAMMPS_VERSION "18 May 2011"
+#define LAMMPS_VERSION "19 May 2011"