diff --git a/news/index.html b/news/index.html
index 412beb75..0bdf98b1 100644
--- a/news/index.html
+++ b/news/index.html
@@ -967,7 +967,7 @@ <h2 class="page-header" data-toc-text="1.0-1" id="aqp-10-1-2012-03-28">aqp 1.0-1
     <div class="section level2">
 <h2 class="page-header" data-toc-text="1.0" id="aqp-10-2012-03-26">aqp 1.0 (2012-03-26)<small>2012-03-27</small><a class="anchor" aria-label="anchor" href="#aqp-10-2012-03-26"></a></h2>
 <ul><li>1.0 release, still missing condensed vignettes- should be ready soon</li>
-<li>see <a href="http://casoilresource.lawr.ucdavis.edu/drupal/taxonomy/term/56" class="external-link uri">http://casoilresource.lawr.ucdavis.edu/drupal/taxonomy/term/56</a> for samples</li>
+<li>see <a href="https://casoilresource.lawr.ucdavis.edu/drupal/taxonomy/term/56" class="external-link uri">https://casoilresource.lawr.ucdavis.edu/drupal/taxonomy/term/56</a> for samples</li>
 <li>A small bug in profile_compare() was fixed, where slices were evaluated as ‘soil’ based on the bottom depth of the profile, and NOT on the presence of actual data. See ?profile_compare for details. This change will have a minor affect on profile comparisons in cases where Cr or R horizons (usually missing most characterization data) have been extended down to some arbitrary depth (usually 150 or 200 cm) AND a maximum depth of evaluation (max_d) was set beyond the actual depth of most profiles in the collection.</li>
 </ul></div>
     <div class="section level2">
diff --git a/pkgdown.yml b/pkgdown.yml
index 9d0d0d4c..7668a5ad 100644
--- a/pkgdown.yml
+++ b/pkgdown.yml
@@ -9,5 +9,5 @@ articles:
   Munsell-color-conversion: Munsell-color-conversion.html
   NCSP: NCSP.html
   new-in-aqp-2: new-in-aqp-2.html
-last_built: 2024-04-18T17:04Z
+last_built: 2024-04-18T17:24Z
 
diff --git a/reference/plot_distance_graph.html b/reference/plot_distance_graph.html
index bb878874..3be5ae1e 100644
--- a/reference/plot_distance_graph.html
+++ b/reference/plot_distance_graph.html
@@ -108,7 +108,7 @@ <h2>Details</h2>
     </div>
     <div id="references">
     <h2>References</h2>
-    <p>http://casoilresource.lawr.ucdavis.edu/</p>
+    <p>https://casoilresource.lawr.ucdavis.edu/</p>
     </div>
     <div id="see-also">
     <h2>See also</h2>
diff --git a/reference/sp1.html b/reference/sp1.html
index 256e69a1..de7628b7 100644
--- a/reference/sp1.html
+++ b/reference/sp1.html
@@ -135,7 +135,7 @@ <h2>Format</h2>
 </dl></div>
     <div id="references">
     <h2>References</h2>
-    <p><a href="http://casoilresource.lawr.ucdavis.edu/" class="external-link">http://casoilresource.lawr.ucdavis.edu/</a></p>
+    <p><a href="https://casoilresource.lawr.ucdavis.edu/" class="external-link">https://casoilresource.lawr.ucdavis.edu/</a></p>
     </div>
 
     <div id="ref-examples">
diff --git a/reference/sp2.html b/reference/sp2.html
index 10377db3..a627b094 100644
--- a/reference/sp2.html
+++ b/reference/sp2.html
@@ -157,7 +157,7 @@ <h2>Source</h2>
     </div>
     <div id="references">
     <h2>References</h2>
-    <p><a href="http://casoilresource.lawr.ucdavis.edu/" class="external-link">http://casoilresource.lawr.ucdavis.edu/</a></p>
+    <p><a href="https://casoilresource.lawr.ucdavis.edu/" class="external-link">https://casoilresource.lawr.ucdavis.edu/</a></p>
     </div>
     <div id="author">
     <h2>Author</h2>
diff --git a/reference/sp3.html b/reference/sp3.html
index fa43c485..e026d3c6 100644
--- a/reference/sp3.html
+++ b/reference/sp3.html
@@ -139,7 +139,7 @@ <h2>Details</h2>
     </div>
     <div id="references">
     <h2>References</h2>
-    <p><a href="http://casoilresource.lawr.ucdavis.edu/" class="external-link">http://casoilresource.lawr.ucdavis.edu/</a></p>
+    <p><a href="https://casoilresource.lawr.ucdavis.edu/" class="external-link">https://casoilresource.lawr.ucdavis.edu/</a></p>
     </div>
 
     <div id="ref-examples">
diff --git a/reference/unroll.html b/reference/unroll.html
index 77f9501c..cb0c1e81 100644
--- a/reference/unroll.html
+++ b/reference/unroll.html
@@ -131,7 +131,7 @@ <h2>Details</h2>
     </div>
     <div id="references">
     <h2>References</h2>
-    <p>http://casoilresource.lawr.ucdavis.edu/</p>
+    <p>https://casoilresource.lawr.ucdavis.edu/</p>
     </div>
     <div id="author">
     <h2>Author</h2>