diff --git a/src/main/java/com/loafle/overflow/crawler/result/OFResultSetCol.java b/src/main/java/com/loafle/overflow/crawler/result/OFResultSetCol.java
index 5d22826..7f9100b 100644
--- a/src/main/java/com/loafle/overflow/crawler/result/OFResultSetCol.java
+++ b/src/main/java/com/loafle/overflow/crawler/result/OFResultSetCol.java
@@ -21,10 +21,10 @@ public class OFResultSetCol extends OFResultSet{
 
         List<String> meta = this.item.getQuery().getKeys();
 
-        String[] columns = (String[])this.item.getQuery().getQueryInfo().get("arrayColumns");
+        List<String> arrayColumns = (List<String>)this.item.getQuery().getQueryInfo().get("arrayColumns");
 
-        for( int indexI = 0 ; indexI < columns.length; ++indexI) {
-            meta.add(columns[indexI]);
+        for( int indexI = 0 ; indexI < arrayColumns.size(); ++indexI) {
+            meta.add(arrayColumns.get(indexI));
         }
 
         if(this.meta == null) {