diff --git a/doc/chrony.conf.adoc b/doc/chrony.conf.adoc
index c7ace3b..3588882 100644
--- a/doc/chrony.conf.adoc
+++ b/doc/chrony.conf.adoc
@@ -2511,7 +2511,7 @@ the following methods:
   stratum 1 and stratum 2 servers. You should find one or more servers that are
   near to you. Check that their access policy allows you to use their
   facilities.
-* Use public servers from the http://www.pool.ntp.org/[pool.ntp.org] project.
+* Use public servers from the https://www.pool.ntp.org/[pool.ntp.org] project.
 
 Assuming that your NTP servers are called _foo.example.net_, _bar.example.net_
 and _baz.example.net_, your _chrony.conf_ file could contain as a minimum:
@@ -2803,7 +2803,7 @@ information to be saved.
 === Public NTP server
 
 *chronyd* can be configured to operate as a public NTP server, e.g. to join the
-http://www.pool.ntp.org/en/join.html[pool.ntp.org] project. The configuration
+https://www.pool.ntp.org/en/join.html[pool.ntp.org] project. The configuration
 is similar to the NTP client with permanent connection, except it needs to
 allow client access from all addresses. It is recommended to find at least four
 good servers (e.g. from the pool, or on the NTP homepage). If the server has a
diff --git a/doc/faq.adoc b/doc/faq.adoc
index 6b8ed6e..8aa412c 100644
--- a/doc/faq.adoc
+++ b/doc/faq.adoc
@@ -68,7 +68,7 @@ system time is periodically copied to the RTC. It is supported on Linux and
 macOS.
 
 If you want to use public NTP servers from the
-http://www.pool.ntp.org/[pool.ntp.org] project, the minimal _chrony.conf_ file
+https://www.pool.ntp.org/[pool.ntp.org] project, the minimal _chrony.conf_ file
 could be:
 
 ----
diff --git a/doc/installation.adoc b/doc/installation.adoc
index 3a5c324..35ce9bf 100644
--- a/doc/installation.adoc
+++ b/doc/installation.adoc
@@ -94,7 +94,7 @@ want to enable the support, specify the `--disable-asyncdns` flag to
 
 If development files for the https://www.lysator.liu.se/~nisse/nettle/[Nettle],
 https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS[NSS], or
-http://www.libtom.net/LibTomCrypt/[libtomcrypt] library are available,
+https://www.libtom.net/LibTomCrypt/[libtomcrypt] library are available,
 `chronyd` will be built with support for other cryptographic hash functions
 than MD5, which can be used for NTP authentication with a symmetric key. If you
 don't want to enable the support, specify the `--disable-sechash` flag to
diff --git a/examples/chrony.conf.example2 b/examples/chrony.conf.example2
index a4cdcd5..bf2bbdd 100644
--- a/examples/chrony.conf.example2
+++ b/examples/chrony.conf.example2
@@ -1,5 +1,5 @@
 # Use public servers from the pool.ntp.org project.
-# Please consider joining the pool (http://www.pool.ntp.org/join.html).
+# Please consider joining the pool (https://www.pool.ntp.org/join.html).
 pool pool.ntp.org iburst
 
 # Record the rate at which the system clock gains/losses time.