diff --git a/src/version.h b/src/version.h
index 04510300bd..d1bfb12b42 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define LAMMPS_VERSION "18 Apr 2010"
+#define LAMMPS_VERSION "21 Apr 2010"