diff --git a/public/index.html b/public/index.html
index fa663bd..6e31ca0 100644
--- a/public/index.html
+++ b/public/index.html
@@ -201,14 +201,14 @@ <h1>Vita</h1>
             <summary>Advanced</summary>
             <fieldset>
                 <legend>Game rules</legend>
-                <input type="radio" id="conway" name="action" checked="true" />
+                <input type="radio" id="conway" name="rules" checked="true" />
                 <label for="conway">Conway (standard)</label>
 
-                <input type="radio" id="seeds" name="action" />
+                <input type="radio" id="seeds" name="rules" />
                 <label for="seeds"><a href="https://conwaylife.com/wiki/OCA:Seeds" target="_blank"
                         rel="noopener noreferrer">Seeds</a></label>
 
-                <input type="radio" id="daynight" name="action" />
+                <input type="radio" id="daynight" name="rules" />
                 <label for="daynight"><a href="https://conwaylife.com/wiki/OCA:Day_&_Night" target="_blank"
                         rel="noopener noreferrer">Day & Night</a></label>
             </fieldset>