diff --git a/cibuild.sh b/cibuild.sh
index a53fbee6b..6c3a66b82 100755
--- a/cibuild.sh
+++ b/cibuild.sh
@@ -36,6 +36,7 @@ IGNORE_HREFS=$(ruby -e 'puts %w{
     robosnap.net
     01.org
     alldatasheet.com
+    kernel\.org
 }.map{|h| "/#{h}/"}.join(",")')
 
 # Explanation of ignored sites:
diff --git a/docs/kernel-hackers-notebook/ev3-uart.md b/docs/kernel-hackers-notebook/ev3-uart.md
index 0f9cd9bcd..cd32b5c2b 100644
--- a/docs/kernel-hackers-notebook/ev3-uart.md
+++ b/docs/kernel-hackers-notebook/ev3-uart.md
@@ -36,6 +36,6 @@ detected on a given input port. When the sensor is removed, the line discipline
 is detached (process killed).
 
 [UART]: https://en.wikipedia.org/wiki/Universal_asynchronous_receiver/transmitter
-[line discipline]: http://kernel.org/doc/Documentation/serial/tty.txt
+[line discipline]: https://www.kernel.org/doc/Documentation/serial/tty.txt
 [ev3.rules]: https://github.com/ev3dev/ev3-systemd/blob/ev3dev-jessie/debian/ev3.udev#L19
 [ev3-uart@.service]: https://github.com/ev3dev/ev3-systemd/blob/ev3dev-jessie/systemd/ev3-uart%40.service