diff --git a/ANNOUNCE b/ANNOUNCE
index e0bd4d0f9c6..109cf921668 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,8 +1,8 @@
-*** ANNOUNCE: SWIG 3.0.13 (in progress) ***
+*** ANNOUNCE: SWIG 4.0.0 (in progress) ***
 
 http://www.swig.org
 
-We're pleased to announce SWIG-3.0.13, the latest SWIG release.
+We're pleased to announce SWIG-4.0.0, the latest SWIG release.
 
 What is SWIG?
 =============
@@ -27,11 +27,11 @@ Availability
 ============
 The release is available for download on Sourceforge at
 
-     http://prdownloads.sourceforge.net/swig/swig-3.0.13.tar.gz
+     http://prdownloads.sourceforge.net/swig/swig-4.0.0.tar.gz
 
 A Windows version is also available at
 
-     http://prdownloads.sourceforge.net/swig/swigwin-3.0.13.zip
+     http://prdownloads.sourceforge.net/swig/swigwin-4.0.0.zip
 
 Please report problems with this release to the swig-devel mailing list,
 details at http://www.swig.org/mail.html.
diff --git a/CHANGES.current b/CHANGES.current
index 46b32f24a8a..f01a29b9618 100644
--- a/CHANGES.current
+++ b/CHANGES.current
@@ -4,8 +4,8 @@ See the RELEASENOTES file for a summary of changes in each release.
 Issue # numbers mentioned below can be found on Github. For more details, add
 the issue number to the end of the URL: https://github.com/swig/swig/issues/
 
-Version 3.0.13 (in progress)
-============================
+Version 4.0.0 (in progress)
+===========================
 
 2017-04-21: tamuratak
             [Ruby] #964 - Add shared_ptr director typemaps.
diff --git a/Doc/Manual/Sections.html b/Doc/Manual/Sections.html
index bdf590ac9d6..739170745da 100644
--- a/Doc/Manual/Sections.html
+++ b/Doc/Manual/Sections.html
@@ -8,7 +8,7 @@
 <H1><a name="Sections">SWIG-3.0 Documentation</a></H1>
 
 <p>
-Last update : SWIG-3.0.13 (in progress)
+Last update : SWIG-4.0.0 (in progress)
 </p>
 
 <H2><a name="Sections_Sections">Sections</a></H2>
diff --git a/README b/README
index 5510e0ec3d6..649602048a7 100644
--- a/README
+++ b/README
@@ -1,6 +1,6 @@
 SWIG (Simplified Wrapper and Interface Generator)
 
-Version: 3.0.13 (in progress)
+Version: 4.0.0 (in progress)
 
 Tagline: SWIG is a compiler that integrates C and C++ with languages
          including Perl, Python, Tcl, Ruby, PHP, Java, C#, D, Go, Lua,
diff --git a/configure.ac b/configure.ac
index 4d9355cd02a..7234a1fd4be 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script.
 dnl The macros which aren't shipped with the autotools are stored in the
 dnl Tools/config directory in .m4 files.
 
-AC_INIT([swig],[3.0.13],[http://www.swig.org])
+AC_INIT([swig],[4.0.0],[http://www.swig.org])
 
 dnl NB: When this requirement is increased to 2.60 or later, AC_PROG_SED
 dnl     definition below can be removed