diff --git a/blkmaker.h b/blkmaker.h
index 9759da2..b1f4d0f 100644
--- a/blkmaker.h
+++ b/blkmaker.h
@@ -11,7 +11,7 @@
 extern "C" {
 #endif
 
-#define BLKMAKER_VERSION (6L)
+#define BLKMAKER_VERSION (7L)
 #define BLKMAKER_MAX_BLOCK_VERSION (4)
 
 extern bool (*blkmk_sha256_impl)(void *hash_out, const void *data, size_t datasz);
diff --git a/configure.ac b/configure.ac
index 41da415..67e3d9e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,7 +5,7 @@ dnl * under the terms of the standard MIT license.  See COPYING for more details
 
 AC_INIT(
 	[libblkmaker],
-	[0.5.2],
+	[0.5.3],
 	[luke_libblkmaker@dashjr.org],
 	[libblkmaker],
 	[http://gitorious.org/bitcoin/libblkmaker])
@@ -19,7 +19,7 @@ m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 LT_INIT([disable-static])
 
 # http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
-AC_SUBST([LIBBLKMAKER_SO_VERSION], [6:2:0])
+AC_SUBST([LIBBLKMAKER_SO_VERSION], [7:0:1])
 AC_SUBST([LIBBLKMAKER_API_VERSION], [0.1])
 
 AC_CONFIG_FILES([Makefile