diff --git a/MANUAL.md b/MANUAL.md
index 09f7ba4..c522eec 100644
--- a/MANUAL.md
+++ b/MANUAL.md
@@ -773,19 +773,19 @@ is not compatible with those of precompiled header file) upon compilation of cot
 
 Cotire is not compatible with [Xoreax IncrediBuild][XGE].
 
-[1260]:http://www.cmake.org/Bug/view.php?id=1260
+[1260]:https://cmake.org/Bug/view.php?id=1260
 [ccch]:https://ccache.samba.org/
 [ccch_pch]:https://ccache.samba.org/manual.html#_precompiled_headers
-[clang_pch]:http://clang.llvm.org/docs/UsersManual.html#precompiled-headers
+[clang_pch]:https://clang.llvm.org/docs/UsersManual.html#precompiled-headers
 [gcc_pch]:https://gcc.gnu.org/onlinedocs/gcc/Precompiled-Headers.html
 [msvc_pch]:https://msdn.microsoft.com/en-us/library/szfdksca(v=vs.90).aspx
 [msvc_pch_create]:https://msdn.microsoft.com/en-us/library/7zc28563(v=vs.90).aspx
 [msvc_pch_use]:https://msdn.microsoft.com/en-us/library/z0atkd6c(v=vs.90).aspx
 [ninja_issue]:https://cmake.org/Bug/view.php?id=13234
-[EoUB]:https://engineering-game-dev.com/2009/12/15/the-evils-of-unity-builds/
+[EoUB]:http://altdevblog.com/2011/08/14/the-evils-of-unity-builds/
 [pch]:https://en.wikipedia.org/wiki/Precompiled_header
 [scu]:https://en.wikipedia.org/wiki/Single_Compilation_Unit
-[objlib]:https://cmake.org/cmake/help/v2.8.12/cmake.html#command:add_library
+[objlib]:https://cmake.org/cmake/help/latest/command/add_library.html#object-libraries
 [pfh]:https://en.wikipedia.org/wiki/Prefix_header
 [icc_linux]:https://software.intel.com/en-us/c-compilers/ipsxe-support
 [XGE]:https://www.incredibuild.com/
diff --git a/README.md b/README.md
index b97dbf1..cc4c8de 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,8 @@ requirements
 
 * [CMake 2.8.12][cmk] or newer. The executable `cmake` should be on the system path.
 * [Visual Studio C++][vslstd], [MinGW][mingw] or [Cygwin][cgwn] under Windows.
-* [GCC][gcc] or [Clang][clang] under Linux or OS X.
+* [Clang][clang] under Windows, Linux or OS X.
+* [GCC][gcc] under Linux or OS X.
 * [Intel C++ compiler][intel] under Windows, Linux or OS X.
 * [Xcode][xcdt] application or Xcode Command Line Tools under OS X.
 
@@ -129,7 +130,7 @@ known issues
 [vslstd]:https://www.visualstudio.com/
 [xcdt]:https://developer.apple.com/xcode/
 [PCHH]:https://gcc.gnu.org/wiki/PCHHaters
-[EoUB]:https://engineering-game-dev.com/2009/12/15/the-evils-of-unity-builds/
+[EoUB]:http://altdevblog.com/2011/08/14/the-evils-of-unity-builds/
 [jom]:https://wiki.qt.io/Jom
 [intel]:https://software.intel.com/en-us/c-compilers
 [XGE]:https://www.incredibuild.com/
diff --git a/license b/license
index 33a6ea7..68c37ca 100644
--- a/license
+++ b/license
@@ -1,4 +1,4 @@
-Copyright (c) 2012-2017 Sascha Kratky
+Copyright (c) 2012-2018 Sascha Kratky
 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation