diff --git a/src/version.h b/src/version.h
index 24866d1e59..3049b5259c 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define LAMMPS_VERSION "31 May 2011"
+#define LAMMPS_VERSION "1 Jun 2011"