diff --git a/doc/install-packages.sgml b/doc/install-packages.sgml
index d0721ed1..727a5009 100644
--- a/doc/install-packages.sgml
+++ b/doc/install-packages.sgml
@@ -10,7 +10,7 @@ system.
    <para>
      RPM packages for `repmgr` are available via Yum through
      the PostgreSQL Global Development Group RPM repository
-     ( <ulink url="http://yum.postgresql.org/">http://yum.postgresql.org/</>).
+     ( <ulink url="https://yum.postgresql.org/">http://yum.postgresql.org/</>).
      Follow the instructions for your distribution (RedHat, CentOS,
      Fedora, etc.) and architecture as detailed at yum.postgresql.org.
    </para>
diff --git a/doc/install-source.sgml b/doc/install-source.sgml
index 7019b21b..b21d6aa8 100644
--- a/doc/install-source.sgml
+++ b/doc/install-source.sgml
@@ -32,7 +32,7 @@
     <listitem>
      <para>
       <literal>RHEL or CentOS 6.x or 7.x</literal>: install the appropriate repository RPM
-      for your system from <ulink url="http://yum.postgresql.org/repopackages.php">
+      for your system from <ulink url="https://yum.postgresql.org/repopackages.php">
       yum.postgresql.org</ulink>. Then install the prerequisites for building
       PostgreSQL with:
       <programlisting>
@@ -65,7 +65,7 @@
    <title>Using <application>git</application> to get the &repmgr; sources</title>
 
    <para>
-    Use <application><ulink url="http://git-scm.org">git</ulink></application> if you expect
+    Use <application><ulink url="https://git-scm.com">git</ulink></application> if you expect
     to update often, you want to keep track of development or if you want to contribute
     changes to &repmgr;. There is no reason <emphasis>not</emphasis> to use <application>git</application>
     if you're familiar with it.
@@ -89,7 +89,7 @@
 
    <para>
     For more information on using <application>git</application> see
-    <ulink url="http://git-scm.org/">git-scm.org</ulink>.
+    <ulink url="https://git-scm.com/">git-scm.com</ulink>.
    </para>
 
   </sect3>
diff --git a/doc/repmgr.sgml b/doc/repmgr.sgml
index 4309e3a9..529e6e7e 100644
--- a/doc/repmgr.sgml
+++ b/doc/repmgr.sgml
@@ -33,11 +33,11 @@
 
    <para>
     repmgr was developed by
-    <ulink url="http://2ndquadrant.com">2ndQuadrant</ulink>
+    <ulink url="https://2ndquadrant.com">2ndQuadrant</ulink>
     along with contributions from other individuals and companies.
     Contributions from the community are appreciated and welcome - get
-    in touch via <ulink url="http://github.com/2ndQuadrant/repmgr">github</>
-    or <ulink url="http://groups.google.com/group/repmgr">the mailing list/forum</>.
+    in touch via <ulink url="https://github.com/2ndQuadrant/repmgr">github</>
+    or <ulink url="https://groups.google.com/group/repmgr">the mailing list/forum</>.
     Multiple 2ndQuadrant customers contribute funding
     to make repmgr development possible.
    </para>