diff --git a/public/index.html b/public/index.html
index 4c32d7c..ed3fc65 100644
--- a/public/index.html
+++ b/public/index.html
@@ -81,7 +81,7 @@
         <nav class="text-xxs flex flex-row gap-x-4">
           <a href="/">home</a>
           <a href="/introduction.html">brief intro</a>
-          <a href="/try-it-now-html.html">try it now</a>
+          <a href="/try-it-now.html">try it now</a>
           <a href="/playground.html">playground</a>
         </nav>
         <h1 class="font-serif font-bold text-cloudbank text-3xl">
diff --git a/public/introduction.html b/public/introduction.html
index d706313..5494810 100644
--- a/public/introduction.html
+++ b/public/introduction.html
@@ -111,7 +111,7 @@
         <nav class="text-xxs flex flex-row gap-x-4">
           <a href="/">home</a>
           <a href="/introduction.html">brief intro</a>
-          <a href="/try-it-now-html.html">try it now</a>
+          <a href="/try-it-now.html">try it now</a>
           <a href="/playground.html">playground</a>
         </nav>
         <h1 class="font-serif font-bold text-cloudbank text-3xl">
diff --git a/public/playground.html b/public/playground.html
index fd3d4ac..14cd54c 100644
--- a/public/playground.html
+++ b/public/playground.html
@@ -81,7 +81,7 @@
         <nav class="text-xxs flex flex-row gap-x-4">
           <a href="/">home</a>
           <a href="/introduction.html">brief intro</a>
-          <a href="/try-it-now-html.html">try it now</a>
+          <a href="/try-it-now.html">try it now</a>
           <a href="/playground.html">playground</a>
         </nav>
         <h1 class="font-serif font-bold text-cloudbank text-3xl">
diff --git a/public/try-it-now-html.html b/public/try-it-now.html
similarity index 100%
rename from public/try-it-now-html.html
rename to public/try-it-now.html