diff --git a/web_src/css/repo.css b/web_src/css/repo.css
index 812962e6916..db8cd9e6879 100644
--- a/web_src/css/repo.css
+++ b/web_src/css/repo.css
@@ -2734,6 +2734,9 @@ tbody.commit-list {
 #diff-file-boxes {
   flex: 1;
   max-width: 100%;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
 }
 
 #diff-file-tree {