diff --git a/conversion.cr b/conversion.cr
index f568073..2443c9c 100644
--- a/conversion.cr
+++ b/conversion.cr
@@ -50,7 +50,16 @@ old_storage.each do |old_project|
 
 	# 3.1. get list properties
 	extra_properties = Hash(String, JSON::Any).new
-	extra_properties["columns"] = JSON.parse(old_project.columns.to_json)
+	# columns = JSON.parse(old_project.columns.to_json)
+	columns = Array(Hash(String, String)).new
+	old_project.columns.each do |col|
+		column = { "id" => col.id, "title" => col.name }
+		columns << column
+		puts "column :"
+		pp! column
+	end
+
+	extra_properties["columns"] = JSON.parse(columns.to_json)
 
 
 	# 3.2. get tasks, create new tasks and store them
@@ -63,9 +72,15 @@ old_storage.each do |old_project|
 		# 2. create a task in the new format
 
 		task_extra_properties = Hash(String, JSON::Any).new
-		task_extra_properties["column"]          = JSON.parse(t.column.to_json)
-		task_extra_properties["backgroundColor"] = JSON.parse(t.color.to_json)
-		task_extra_properties["assigneeId"]      = JSON.parse(t.assigned_to.to_json)
+		task_extra_properties["column"] = JSON.parse(t.column.to_json)
+
+		# change the default color of the task, to match the new default list background color
+		if t.color == "dark"
+			task_extra_properties["backgroundColor"] = JSON.parse("white".to_json)
+		else
+			task_extra_properties["backgroundColor"] = JSON.parse(t.color.to_json)
+		end
+		task_extra_properties["assigneeId"] = JSON.parse(t.assigned_to.to_json)
 
 		newtask = ::TodoD::Task.new old_project.id, t.title, t.author,
 			description: (t.description || ""),
@@ -83,6 +98,7 @@ old_storage.each do |old_project|
 
 	u = User.new
 	list = TodoD::List.new old_project.name, u, extra_properties
+	list.id = old_project.id
 	list.tasks = tasks.map &.id
 
 	# puts ""