diff --git a/Troubleshooting.md b/Troubleshooting.md
index 035bb67..62021fd 100644
--- a/Troubleshooting.md
+++ b/Troubleshooting.md
@@ -1,3 +1,6 @@
+### This app requires accurate timestamps
+The app requires that your clock is accurate to within a minute or two. The easiest way to do this is to check “Set time automatically” and maybe “Set time zone automatically” in your system's Date & Time settings.
+
 ### Shipyard data not reported
 The Frontier server that supplies the data to this app sometimes fails to supply shipyard data. Visit the shipyard in-game and try “Updating” again.