X-Git-Url: http://nitlanguage.org

diff --git a/contrib/tnitter/src/action.nit b/contrib/tnitter/src/action.nit
index ad41a71..60ee384 100644
--- a/contrib/tnitter/src/action.nit
+++ b/contrib/tnitter/src/action.nit
@@ -266,14 +266,14 @@ class TnitterREST
 			db.close
 
 			var response = new HttpResponse(200)
-			response.body = posts.to_json_string
+			response.body = posts.serialize_to_json
 			return response
 		end
 
 		# Format not recognized
 		var error = new Error("Bad Request")
 		var response = new HttpResponse(400)
-		response.body = error.to_json_string
+		response.body = error.serialize_to_json
 		return response
 	end
 end