diff --git a/configure.ac b/configure.ac
index 64b2f80cf..03f39a36c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,9 +5,9 @@
 # This file is part of wolfSSL. (formerly known as CyaSSL)
 #
 #
-AC_COPYRIGHT([Copyright (C) 2006-2018 wolfSSL Inc.])
+AC_COPYRIGHT([Copyright (C) 2006-2019 wolfSSL Inc.])
 AC_PREREQ([2.63])
-AC_INIT([wolfssl],[3.15.7],[https://github.com/wolfssl/wolfssl/issues],[wolfssl],[https://www.wolfssl.com])
+AC_INIT([wolfssl],[4.0.0],[https://github.com/wolfssl/wolfssl/issues],[wolfssl],[https://www.wolfssl.com])
 AC_CONFIG_AUX_DIR([build-aux])
 
 # The following sets CFLAGS and CXXFLAGS to empty if unset on command line.
@@ -34,7 +34,7 @@ LT_PREREQ([2.2])
 LT_INIT([disable-static win32-dll])
 
 #shared library versioning
-WOLFSSL_LIBRARY_VERSION=20:0:1
+WOLFSSL_LIBRARY_VERSION=21:0:2
 #                        | | |
 #                 +------+ | +---+
 #                 |        |     |
diff --git a/wolfssl/version.h b/wolfssl/version.h
index 3864b0342..fb4e7acfb 100644
--- a/wolfssl/version.h
+++ b/wolfssl/version.h
@@ -28,8 +28,8 @@
 extern "C" {
 #endif
 
-#define LIBWOLFSSL_VERSION_STRING "3.15.7"
-#define LIBWOLFSSL_VERSION_HEX 0x03015007
+#define LIBWOLFSSL_VERSION_STRING "4.0.0"
+#define LIBWOLFSSL_VERSION_HEX 0x04000000
 
 #ifdef __cplusplus
 }