diff --git a/apps/block_scout_web/assets/css/_code.scss b/apps/block_scout_web/assets/css/_code.scss
index a3c4f5823c..510352ad6f 100644
--- a/apps/block_scout_web/assets/css/_code.scss
+++ b/apps/block_scout_web/assets/css/_code.scss
@@ -14,7 +14,7 @@ pre {
 .pre-decompiled code::before {
   content: counter(line);
   display: inline-block;
-  width: flex;
+  width: 3em;
   border-right: 1px solid #ddd;
   padding: 0 .5em;
   margin-right: .5em;