diff --git a/src/main/java/com/loafle/overflow/crawler/result/OFResultSetRow.java b/src/main/java/com/loafle/overflow/crawler/result/OFResultSetRow.java
index ccd5da5..63407b7 100644
--- a/src/main/java/com/loafle/overflow/crawler/result/OFResultSetRow.java
+++ b/src/main/java/com/loafle/overflow/crawler/result/OFResultSetRow.java
@@ -88,7 +88,8 @@ public class OFResultSetRow extends OFResultSet{
         for (int  i =0 ; i< arrayColumns.size() ; ++i) {
             // replace
             String k = "$" + i;
-            metric = metric.replace(k,data.get(this.meta.get(arrayColumns.get(i))));
+            String replaceString = data.get(this.meta.get(arrayColumns.get(i)));
+            metric = metric.replace(k,"'" + replaceString + "'");
         }
 
         return metric;