diff --git a/src/version.h b/src/version.h
index 61e9e48d8d..5453238e4e 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define LAMMPS_VERSION "19 Apr 2012"
+#define LAMMPS_VERSION "20 Apr 2012"