diff --git a/GUI/xephem/fallbacks.c b/GUI/xephem/fallbacks.c
index 5b31788..34091fe 100644
--- a/GUI/xephem/fallbacks.c
+++ b/GUI/xephem/fallbacks.c
@@ -744,11 +744,11 @@ String fallbacks[] = {
     "XEphem*WCS.y: 10",
     "XEphem*WebDB*Pattern.value: ",
     "XEphem*WebDB*Search.set: False",
-    "XEphem*WebDB*URL0.value: http://celestrak.org/NORAD/elements/stations.txt",
-    "XEphem*WebDB*URL1.value: http://celestrak.org/NORAD/elements/science.txt",
-    "XEphem*WebDB*URL2.value: http://celestrak.org/NORAD/elements/tle-new.txt",
-    "XEphem*WebDB*URL3.value: http://celestrak.org/NORAD/elements/amateur.txt",
-    "XEphem*WebDB*URL4.value: http://celestrak.org/NORAD/elements/visual.txt",
+    "XEphem*WebDB*URL0.value: https://celestrak.org/NORAD/elements/stations.txt",
+    "XEphem*WebDB*URL1.value: https://celestrak.org/NORAD/elements/science.txt",
+    "XEphem*WebDB*URL2.value: https://celestrak.org/NORAD/elements/tle-new.txt",
+    "XEphem*WebDB*URL3.value: https://celestrak.org/NORAD/elements/amateur.txt",
+    "XEphem*WebDB*URL4.value: https://celestrak.org/NORAD/elements/visual.txt",
     "XEphem*WebDB*URL5.value: https://www.minorplanetcenter.net/iau/Ephemerides/Comets/Soft03Cmt.txt",
     "XEphem*WebDB*URL6.value: https://www.minorplanetcenter.net/iau/Ephemerides/CritList/Soft03CritList.txt",
     "XEphem*WebDB*URL7.value: https://www.minorplanetcenter.net/iau/Ephemerides/Distant/Soft03Distant.txt",
diff --git a/GUI/xephem/help/png/internet-update.png b/GUI/xephem/help/png/internet-update.png
index c0be035..1371ceb 100644
Binary files a/GUI/xephem/help/png/internet-update.png and b/GUI/xephem/help/png/internet-update.png differ
diff --git a/GUI/xephem/help/xephem.html b/GUI/xephem/help/xephem.html
index 2c397c9..f981dda 100644
--- a/GUI/xephem/help/xephem.html
+++ b/GUI/xephem/help/xephem.html
@@ -7991,7 +7991,7 @@ format if it is not already.<br>
 <br>
 Several particularly useful sites as of this build are already entered.
 The first five are from Dr. TS Kelso's Earth satellite lists at <a
- href="https://www.celestrak.org">celestrak.org</a>. The other four are
+ href="https://celestrak.org">celestrak.org</a>. The other four are
 the Minor Planet Center's lists of hot comets and unusual asteroids
 specially formatted for <a
  href="https://www.minorplanetcenter.net/iau/Ephemerides/Soft03.html">XEphem</a>.
@@ -7999,12 +7999,9 @@ Click <span style="font-weight: bold;">Get</span> beside the desired
 catalog to download the file to the Private directory and
 simultaneously load into XEphem memory.<br>
 <br>
-Special files created by
-<!-- could not found the correct linke
-<a href="http://cfa-www.harvard.edu/cfa/ps/mpc.html">Minor Planet Center</a>
-and
--->
-the <a href="https://asteroid.lowell.edu/">Lowell
+Special files created by the <a
+ href="https://www.minorplanetcenter.net/data/">Minor Planet Center</a>
+and <a href="https://asteroid.lowell.edu/astorb/">Lowell
 Observatory</a> may also be downloaded.
 Each organization maintains
 extensive lists of all known asteroids and produces on a regular basis