diff --git a/appveyor.yml b/appveyor.yml
index a0ad244..b4fb414 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,4 @@
-version: '2.0.{build}'
+version: '2.1.{build}'
 
 install:
   - set PATH=%PATH%;C:\msys64\mingw32\bin
diff --git a/miniupnpc/CMakeLists.txt b/miniupnpc/CMakeLists.txt
index fbc2577..c1061b1 100644
--- a/miniupnpc/CMakeLists.txt
+++ b/miniupnpc/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
 
 project (miniupnpc C)
 
-set (MINIUPNPC_VERSION 2.0)
+set (MINIUPNPC_VERSION 2.1)
 set (MINIUPNPC_API_VERSION 17)
 
 option (UPNPC_BUILD_STATIC "Build static library" TRUE)
diff --git a/miniupnpc/Changelog.txt b/miniupnpc/Changelog.txt
index e1e4b5d..bb2c042 100644
--- a/miniupnpc/Changelog.txt
+++ b/miniupnpc/Changelog.txt
@@ -1,6 +1,12 @@
-$Id: Changelog.txt,v 1.229 2017/12/12 11:26:25 nanard Exp $
+$Id: Changelog.txt,v 1.235 2018/05/07 11:05:16 nanard Exp $
 miniUPnP client Changelog.
 
+VERSION 2.1 : released 2018/05/07
+
+2018/05/07:
+  CMake Modernize and cleanup CMakeLists.txt
+  Update MS Visual Studio projects
+
 2018/04/30:
   listdevices: show devices sorted by XML desc URL
 
diff --git a/miniupnpc/VERSION b/miniupnpc/VERSION
index cd5ac03..879b416 100644
--- a/miniupnpc/VERSION
+++ b/miniupnpc/VERSION
@@ -1 +1 @@
-2.0
+2.1
diff --git a/miniupnpc/miniupnpc.h b/miniupnpc/miniupnpc.h
index 48afa1c..8ddc282 100644
--- a/miniupnpc/miniupnpc.h
+++ b/miniupnpc/miniupnpc.h
@@ -1,4 +1,4 @@
-/* $Id: miniupnpc.h,v 1.50 2016/04/19 21:06:21 nanard Exp $ */
+/* $Id: miniupnpc.h,v 1.53 2018/05/07 11:05:16 nanard Exp $ */
 /* vim: tabstop=4 shiftwidth=4 noexpandtab
  * Project: miniupnp
  * http://miniupnp.free.fr/
@@ -20,7 +20,7 @@
 #define UPNPDISCOVER_MEMORY_ERROR (-102)
 
 /* versions : */
-#define MINIUPNPC_VERSION	"2.0"
+#define MINIUPNPC_VERSION	"2.1"
 #define MINIUPNPC_API_VERSION	17
 
 /* Source port: