diff --git a/ChangeLog b/ChangeLog
index 1798b28..0380617 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,29 @@
+protobuf-c (1.3.1)
+
+  [ Robert Edmonds ]
+  * Release 1.3.1.
+
+  * Restore protobuf-2.x compatibility (#284, #285).
+
+  * Use xenial and protobuf 3.6.1 in the Travis-CI environment (#332).
+
+  * Convert uses of protobuf's scoped_ptr.h to C++11 std::unique_ptr, needed
+    to compile against protobuf 3.6.1 (#320, #333).
+
+  * Use AX_CXX_COMPILE_STDCXX macro to enable C++11 support in old compilers
+    (#312, #317, #327, #334).
+
+  [ Fredrik Gustafsson ]
+  * Add std:: to some types (#294, #305, #309).
+
+  [ Sam Collinson ]
+  * Check the return value of int_range_lookup before using as an array index;
+    it can return -1 (#315).
+
+  [ Matthias Dittrich ]
+  * Fix compilation on mingw by using explicit protoc --plugin=NAME=PATH syntax
+    in Makefile.am (#289, #290).
+
 protobuf-c (1.3.0)
 
   [ Robert Edmonds ]
diff --git a/build-cmake/CMakeLists.txt b/build-cmake/CMakeLists.txt
index 1658314..1097a63 100644
--- a/build-cmake/CMakeLists.txt
+++ b/build-cmake/CMakeLists.txt
@@ -1,6 +1,6 @@
 SET(PACKAGE protobuf-c)
 SET(PACKAGE_NAME protobuf-c)
-SET(PACKAGE_VERSION 1.3.0)
+SET(PACKAGE_VERSION 1.3.1)
 
 
 CMAKE_MINIMUM_REQUIRED(VERSION 2.8 FATAL_ERROR)
diff --git a/configure.ac b/configure.ac
index 81cf287..cb93036 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 AC_PREREQ(2.63)
 
 AC_INIT([protobuf-c],
-        [1.3.0],
+        [1.3.1],
         [https://github.com/protobuf-c/protobuf-c/issues],
         [protobuf-c],
         [https://github.com/protobuf-c/protobuf-c])
diff --git a/protobuf-c/protobuf-c.h b/protobuf-c/protobuf-c.h
index c8fa4fc..390bf42 100755
--- a/protobuf-c/protobuf-c.h
+++ b/protobuf-c/protobuf-c.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008-2017, Dave Benson and the protobuf-c authors.
+ * Copyright (c) 2008-2018, Dave Benson and the protobuf-c authors.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -790,13 +790,13 @@ protobuf_c_version_number(void);
  * The version of the protobuf-c headers, represented as a string using the same
  * format as protobuf_c_version().
  */
-#define PROTOBUF_C_VERSION		"1.3.0"
+#define PROTOBUF_C_VERSION		"1.3.1"
 
 /**
  * The version of the protobuf-c headers, represented as an integer using the
  * same format as protobuf_c_version_number().
  */
-#define PROTOBUF_C_VERSION_NUMBER	1003000
+#define PROTOBUF_C_VERSION_NUMBER	1003001
 
 /**
  * The minimum protoc-c version which works with the current version of the