diff --git a/Include/patchlevel.h b/Include/patchlevel.h
index 09b055f79ba..c2d56f11d94 100644
--- a/Include/patchlevel.h
+++ b/Include/patchlevel.h
@@ -21,12 +21,12 @@
 /* Version parsed out into numeric values */
 #define PY_MAJOR_VERSION	2
 #define PY_MINOR_VERSION	5
-#define PY_MICRO_VERSION	2
-#define PY_RELEASE_LEVEL	PY_RELEASE_LEVEL_FINAL
+#define PY_MICRO_VERSION	3
+#define PY_RELEASE_LEVEL	PY_RELEASE_LEVEL_ALPHA
 #define PY_RELEASE_SERIAL	0
 
 /* Version as a string */
-#define PY_VERSION		"2.5.2"
+#define PY_VERSION		"2.5.3a0"
 
 /* Subversion Revision number of this file (not of the repository) */
 #define PY_PATCHLEVEL_REVISION  "$Revision$"