diff --git a/src/version.h b/src/version.h
index 0394e9ea57..964715a13f 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define LAMMPS_VERSION "12 May 2010"
+#define LAMMPS_VERSION "13 May 2010"