doc: update mentioned compiler versions

diff --git a/doc/readme.html b/doc/readme.html
index 9bc63c9cb9a037afb7bbcd03867f24444a46d383..9e7d07333a8af26412b1a3360bf0c1d716412b43 100644 (file)
--- a/doc/readme.html
+++ b/doc/readme.html
@@ -67,8 +67,8 @@
         <acronym>deal.II</acronym> supports at least the following platforms:
     </p>
     <ul>
-        <li>GNU/Linux: GCC version 5.0 or later; Clang version 4.0 or later; ICC versions 15 or later</li>
-        <li>Mac OS X: GCC version 5.0 or later; Clang version 4.0 or later; <a href="https://en.wikipedia.org/wiki/Xcode#Xcode_7.0_-_11.x_(since_Free_On-Device_Development)">Apple Clang version 9.0</a>  or later.
+        <li>GNU/Linux: GCC version 5.0 or later; Clang version 5.0 or later; ICC versions 15 or later</li>
+        <li>Mac OS X: GCC version 5.0 or later; Clang version 5.0 or later; <a href="https://en.wikipedia.org/wiki/Xcode#Xcode_7.0_-_11.x_(since_Free_On-Device_Development)">Apple Clang version 9.0</a>  or later.
             Please see the <a href="https://github.com/dealii/dealii/wiki/MacOSX" target="_top">deal.II Wiki</a> for installation instructions.</li>
         <li>Windows: experimental support for Visual Studio 2017. Please have a look at the
             <a href="https://github.com/dealii/dealii/wiki/Frequently-Asked-Questions#can-i-use-dealii-on-a-windows-platform">