diff --git a/lib/caracal/core/models/table_model.rb b/lib/caracal/core/models/table_model.rb
index 5949a3c0..a457a458 100644
--- a/lib/caracal/core/models/table_model.rb
+++ b/lib/caracal/core/models/table_model.rb
@@ -61,7 +61,7 @@ def cells
         end
         
         def cols
-          rows.reduce([]) do |array, row|
+          @cols ||= rows.reduce([]) do |array, row|
             row.each_with_index do |cell, index|
               array[index]  = []    if array[index].nil?
               array[index] << cell