diff --git a/framework/yii/debug/assets/main.css b/framework/yii/debug/assets/main.css
index 259256fc47..6cb65ddba8 100644
--- a/framework/yii/debug/assets/main.css
+++ b/framework/yii/debug/assets/main.css
@@ -147,5 +147,6 @@ ul.trace {
 }
 
 td, th {
-	overflow: auto;
+	white-space: pre;
+	word-wrap: break-word;
 }
diff --git a/framework/yii/gii/assets/main.css b/framework/yii/gii/assets/main.css
index 36f563476f..8efc56c412 100644
--- a/framework/yii/gii/assets/main.css
+++ b/framework/yii/gii/assets/main.css
@@ -44,7 +44,8 @@ body {
 .default-view .sticky-value {
 	padding: 6px 12px;
 	background: lightyellow;
-	overflow: auto;
+	white-space: pre;
+	word-wrap: break-word;
 }
 
 .default-view .form-group label.help {