===================================================================
@@ -366,7 +366,7 @@
@item MPFR Library version 2.4.2 (or later)
Necessary to build GCC@. It can be downloaded from
-@uref{http://www.mpfr.org/}. If an MPFR source distribution is found
+@uref{https://www.mpfr.org}. If an MPFR source distribution is found
in a subdirectory of your GCC sources named @file{mpfr}, it will be
built together with GCC. Alternatively, if MPFR is already installed
but it is not in your default library search path, the