diff --git a/html/index.html b/html/index.html
index 05ffadd..8c97241 100644
--- a/html/index.html
+++ b/html/index.html
@@ -93,6 +93,7 @@
                 <li><code>python 2.7.18 and 3.7.7</code></li>
                 <li><code>racket 7.6</code></li>
                 <li><code>rakudo (Raku / Perl6) 2018.12</code></li>
+                <li><code>regina (Rexx) 3.9.1</code></li>
                 <li><code>ruby 2.5.8, 2.6.6, 2.7.1</code></li>
                 <li><code>rust 1.42</code></li>
 		<li><code>sbcl (Common Lisp) 2.0.1</code></li>