diff --git a/Doc/Manual/CSharp.html b/Doc/Manual/CSharp.html
index 405868b5c..3cfff6e68 100644
--- a/Doc/Manual/CSharp.html
+++ b/Doc/Manual/CSharp.html
@@ -566,7 +566,7 @@ After SWIG has run and both the C# and C/C++ compilers have finished building,
 the examples will be run, by either running <tt>runme.exe</tt> or by running
 <tt>mono runme.exe</tt> (Mono C# compiler).
 Windows users can also get the examples working using a
-<a href="http://www.cygwin.com">Cygwin</a> or <a href="http://www.mingw.org">MinGW</a> environment for automatic configuration of the example makefiles.
+<a href="http://www.cygwin.com">Cygwin</a> or <a href="https://osdn.net/projects/mingw/">MinGW</a> environment for automatic configuration of the example makefiles.
 Any one of the C# compilers (Mono or Microsoft) can be detected from within a Cygwin or Mingw environment if installed in your path. 
 
 <H2><a name="CSharp_void_pointers">23.3 Void pointers</a></H2>
diff --git a/Doc/Manual/Windows.html b/Doc/Manual/Windows.html
index cdf56c785..80f4be3f9 100644
--- a/Doc/Manual/Windows.html
+++ b/Doc/Manual/Windows.html
@@ -220,7 +220,7 @@ Normally this is not needed, so most people will want to ignore this section.
 
 <p>
 There are various ways to build the SWIG executable including <a href="https://cmake.org/">CMake</a> which is able to generate project files for building with Visual Studio.
-SWIG can also be compiled and run using <a href="https://www.msys2.org/">MSYS2</a>, <a href="https://www.cygwin.com">Cygwin</a> or <a href="http://www.mingw.org">MinGW</a>, all of which provide a Unix like front end to Windows and comes free with the gcc C/C++ compiler.
+SWIG can also be compiled and run using <a href="https://www.msys2.org/">MSYS2</a>, <a href="https://www.cygwin.com">Cygwin</a> or <a href="https://osdn.net/projects/mingw/">MinGW</a>, all of which provide a Unix like front end to Windows and comes free with the gcc C/C++ compiler.
 </p>
 
 
@@ -364,7 +364,7 @@ The short abbreviated instructions follow...
 </p>
 
 <ul>
-    <li>Install MinGW and MSYS from the <a href="http://www.mingw.org">MinGW</a> site. This provides a Unix environment on Windows.
+    <li>Install MinGW and MSYS from the <a href="https://osdn.net/projects/mingw/">MinGW</a> site. This provides a Unix environment on Windows.
     <li>Follow the usual Unix instructions in the README file in the SWIG root directory to build swig.exe from the MinGW command prompt.
 </ul>
 
@@ -380,8 +380,7 @@ Execute the steps in the order shown and don't use spaces in path names. In fact
 
 <ol>
   <li>
-  Download the following packages from the <a href="http://www.mingw.org/download.shtml">MinGW download page</a>
-  or <a href="https://sourceforge.net/projects/mingw/files/">MinGW SourceForge download page</a>.
+  Download the following packages from the <a href="https://osdn.net/projects/mingw/releases/">MinGW download page</a>.
   Note that at the time of writing, the majority of these are in the Current
   release list and some are in the Snapshot or Previous release list.
   <ul>