diff --git a/src/components/MarkdownContents/MarkdownContents.module.css b/src/components/MarkdownContents/MarkdownContents.module.css
index 32735301..0cfdd4e8 100644
--- a/src/components/MarkdownContents/MarkdownContents.module.css
+++ b/src/components/MarkdownContents/MarkdownContents.module.css
@@ -12,7 +12,7 @@
   list-style-position: inside;
 }
 
-@media (max-width: 767px) {
+@media (width <= 767px) {
   .wrapper {
     max-width: 380px;
   }