diff --git a/README.md b/README.md
index 056da44..c2eec45 100644
--- a/README.md
+++ b/README.md
@@ -16,10 +16,11 @@ for best results.
 install the vendor's driver and any related packages. (Nouveau
 unfortunately won't work for Nvidia cards.)
 
-* hard drive temperatures require either `udisks2`, or both `hddtemp`
-  and `netcat` (udisks2 should already be installed with this package,
-  but if you want to use hddtemp instead, you will need to install it
-  and netcat yourself)
+* hard drive temperatures requires udisks2, or smartmontools, or both
+  hddtemp and GNU netcat. (udisks2 should already be installed by
+  default on Fedora Workstation, but if you want to use hddtemp instead,
+  you will need to install it and netcat yourself, and enable the
+  hddtemp daemon.)
 * Nvidia GPU temperatures require the `nvidia-settings` application,
   typically installed with the proprietary Nvidia drivers
 * AMD GPU temperatures requires `aticonfig`, part of AMD Radeon Software
diff --git a/gnome-shell-extension-freon.spec b/gnome-shell-extension-freon.spec
index 00d2859..35b4383 100644
--- a/gnome-shell-extension-freon.spec
+++ b/gnome-shell-extension-freon.spec
@@ -34,15 +34,16 @@ top bar.
 install the vendor's driver and any related packages. (Nouveau
 unfortunately won't work for Nvidia cards.)
 
-* hard drive temperatures require either `udisks2`, or both `hddtemp`
-  and `netcat` (udisks2 should already be installed with this package,
-  but if you want to use hddtemp instead, you will need to install it
-  and netcat yourself)
+* hard drive temperatures requires udisks2, or smartmontools, or both
+  hddtemp and GNU netcat. (udisks2 should already be installed by
+  default on Fedora Workstation, but if you want to use hddtemp instead,
+  you will need to install it and netcat yourself, and enable the
+  hddtemp daemon.)
 * Nvidia GPU temperatures require the `nvidia-settings` application,
-  typically installed with the proprietary Nvidia drivers
+  typically installed with the proprietary Nvidia drivers.
+* Bumblebee + Nvidia requires `optirun`.
 * AMD GPU temperatures requires `aticonfig`, part of AMD Radeon Software
-  (formerly known as AMD Catalyst)
-* Bumblebee + Nvidia requires `optirun`
+  (formerly known as AMD Catalyst).