diff --git a/html_files/ionization_energies.html b/html_files/ionization_energies.html
index 7bc1f91..026a8b5 100644
--- a/html_files/ionization_energies.html
+++ b/html_files/ionization_energies.html
@@ -99,12 +99,12 @@
 Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2023).
   <i>NIST Atomic Spectra Database</i> (ver.&nbsp;5.11),
   [Online]. Available: <span style="color:#0000cc;">https://physics.nist.gov/asd</span>
-  [2024, April 13].
+  [2024, April 20].
   National Institute of Standards and Technology, Gaithersburg, MD.
     DOI: <span style="color:#0000cc;">https://doi.org/10.18434/T4W30F</span>
 <br />
 <div style="text-align: right; font-size: x-small">
-<a href="javascript:void(0)" onclick="popdef('/cgi-bin/ASD/bibtex.pl?y=2024&amp;m=April&amp;d=13');return true" target="_top">BibTex Citation</a> (new window)
+<a href="javascript:void(0)" onclick="popdef('/cgi-bin/ASD/bibtex.pl?y=2024&amp;m=April&amp;d=20');return true" target="_top">BibTex Citation</a> (new window)
 </div>
 </div>
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