diff --git a/public/scripts/extensions/expressions/style.css b/public/scripts/extensions/expressions/style.css
index 8169a81b5..a162970e2 100644
--- a/public/scripts/extensions/expressions/style.css
+++ b/public/scripts/extensions/expressions/style.css
@@ -38,6 +38,7 @@ img.expression[src=""] {
 
 img.expression.default {
     vertical-align: middle;
+    max-height: 120px;
 }
 
 .debug-image {