diff --git a/libstdc++-v3/doc/html/manual/setup.html b/libstdc++-v3/doc/html/manual/setup.html
index 1963cdf695a990be5561c0b09ba610729991efbe..78d2a00c50a4a11abaf6a829e11cf52e0dfa10b4 100644
--- a/libstdc++-v3/doc/html/manual/setup.html
+++ b/libstdc++-v3/doc/html/manual/setup.html
@@ -21,9 +21,10 @@
    </p><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="manual.intro.setup.prereq"></a>Prerequisites</h2></div></div></div><p>
   Because libstdc++ is part of GCC, the primary source for
    installation instructions is
-   <a class="link" href="http://gcc.gnu.org/install/" target="_top">the GCC install page</a>.
-   In particular, list of prerequisite software needed to build the library
-   <a class="link" href="http://gcc.gnu.org/install/prerequisites.html" target="_top">
+   <a class="link" href="https://gcc.gnu.org/install/" target="_top">the GCC install page</a>.
+   In particular, the list of prerequisite software needed to build
+   the library
+   <a class="link" href="https://gcc.gnu.org/install/prerequisites.html" target="_top">
    starts with those requirements.</a> The same pages also list
    the tools you will need if you wish to modify the source.
 </p><p>
diff --git a/libstdc++-v3/doc/xml/manual/prerequisites.xml b/libstdc++-v3/doc/xml/manual/prerequisites.xml
index a02d3795830c63cb53b5946d8c439cf8d6a5189c..a3c6e732a771c132abf1a565b0447837c7214f4f 100644
--- a/libstdc++-v3/doc/xml/manual/prerequisites.xml
+++ b/libstdc++-v3/doc/xml/manual/prerequisites.xml
@@ -14,9 +14,9 @@
 <para>
   Because libstdc++ is part of GCC, the primary source for
    installation instructions is
-   <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://gcc.gnu.org/install/">the GCC install page</link>.
+   <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://gcc.gnu.org/install/">the GCC install page</link>.
    In particular, list of prerequisite software needed to build the library
-   <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="http://gcc.gnu.org/install/prerequisites.html">
+   <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://gcc.gnu.org/install/prerequisites.html">
    starts with those requirements.</link> The same pages also list
    the tools you will need if you wish to modify the source.
 </para>