diff --git a/view/theme/redbasic/css/style.css b/view/theme/redbasic/css/style.css
index 5768ccbd9..a63042b87 100644
--- a/view/theme/redbasic/css/style.css
+++ b/view/theme/redbasic/css/style.css
@@ -2039,3 +2039,7 @@ dl.bb-dl > dd > li {
     border-style: solid;
     border-width: 5px;
 }
+
+#wiki-preview img {
+    max-width: 100%;
+}
\ No newline at end of file