diff --git a/css/custom.css b/css/custom.css
index 0ff70b1..ca62bab 100644
--- a/css/custom.css
+++ b/css/custom.css
@@ -3,7 +3,7 @@ body {
     --themecolor: #002060;
 }
 
-body.justify{
+.justify{
   text-align: justify;
 }
 
@@ -13,6 +13,18 @@ h1, h2, h3, h4, h5, h6 {
     display: block;
 }
 
+h1.justify{
+  text-align: justify;
+}
+
+h2.justify{
+  text-align: justify;
+}
+
+h3.justify{
+  text-align: justify;
+}
+
 .scale-img {
   // width: 250px; /*画像の幅*/
   // height: 175px; /*画像の高さ*/
diff --git a/index.html b/index.html
index 4dc196e..190a350 100644
--- a/index.html
+++ b/index.html
@@ -229,5 +229,5 @@ <h2 id="acknowledgement">Acknowledgement</h2>
 
 <!--
 MkDocs version : 1.6.0
-Build Date UTC : 2024-07-15 13:38:56.893243+00:00
+Build Date UTC : 2024-07-15 13:40:57.287508+00:00
 -->