diff --git a/core/src/main/resources/render/html-wrapper.html b/core/src/main/resources/render/html-wrapper.html
index 2c3063f9..10e8d992 100644
--- a/core/src/main/resources/render/html-wrapper.html
+++ b/core/src/main/resources/render/html-wrapper.html
@@ -44,7 +44,8 @@
 
         .align {
             width: 100%;
-            display: block;
+            display: flex;
+            flex-direction: column;
         }
 
         .align-left {
diff --git a/core/src/main/resources/render/theme/layout/beamer.css b/core/src/main/resources/render/theme/layout/beamer.css
index 4125d4dc..9b5eb181 100644
--- a/core/src/main/resources/render/theme/layout/beamer.css
+++ b/core/src/main/resources/render/theme/layout/beamer.css
@@ -67,6 +67,7 @@ table tr:last-child td {
 }
 
 .box {
+    width: 100%;
     margin: 12px;
     border-radius: 8px;
 }