diff --git a/doc/t2h.init b/doc/t2h.init
index c41be2ef3762f5c0b64635a7f34ff5236774c3fa..a01a971b20a87e77fc0e64b6e326df9867093fb4 100644
--- a/doc/t2h.init
+++ b/doc/t2h.init
@@ -22,7 +22,7 @@ EOT
my $TEMPLATE_HEADER2 = $ENV{"FFMPEG_HEADER2"} || <<EOT;
</head>
<body>
- <div style="width: 95%; margin: auto">
+ <div class="container">
EOT
my $TEMPLATE_FOOTER = $ENV{"FFMPEG_FOOTER"} || <<EOT;
diff --git a/doc/t2h.pm b/doc/t2h.pm
index 5efb2da48315696390003f3093733b5008a069dc..e83d564a65458a099f56e3dd05a7bca21551dfc1 100644
--- a/doc/t2h.pm
+++ b/doc/t2h.pm
@@ -174,7 +174,7 @@ EOT
<link rel="stylesheet" type="text/css" href="style.min.css">
</head>
<body>
- <div style="width: 95%; margin: auto">
+ <div class="container">
<h1>
EOT