diff --git a/doc/manual/core_device.rst b/doc/manual/core_device.rst
index cfd809019..d5de73a75 100644
--- a/doc/manual/core_device.rst
+++ b/doc/manual/core_device.rst
@@ -34,7 +34,7 @@ Kasli
 Standalone variants
 +++++++++++++++++++
 
-Kasli is connected to the network using a 1000Base-X SFP module. `No-name <fs.com>`_ BiDi (1000Base-BX) modules have been used successfully. The SFP module for the network should be installed into the SFP0 cage.
+Kasli is connected to the network using a 1000Base-X SFP module. `No-name <https://www.fs.com>`_ BiDi (1000Base-BX) modules have been used successfully. The SFP module for the network should be installed into the SFP0 cage.
 The other SFP cages are not used.
 
 The RTIO clock frequency is 125MHz or 150MHz, which is generated by the Si5324.