diff --git a/play/sensei-garden.org b/play/sensei-garden.org
index 847f385..44eef4d 100644
--- a/play/sensei-garden.org
+++ b/play/sensei-garden.org
@@ -17,7 +17,7 @@
     <div class="play-console__screen">
       <p>Sensei Chi says:</p>
       <p>The seed does not hurry because the calendar is watching.</p>
-      <p>Aphy asks whether patience can be optimized.</p>
+      <p>Aphy asks whether patience can be optimised.</p>
       <p>Sensei Chi smiles. "Only by becoming unnecessary."</p>
     </div>
   </section>