diff --git a/.travis.yml b/.travis.yml
index b821717..a6bd30c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: cpp
 os: linux
-dist: trusty
+dist: xenial
 compiler:
 - gcc
 before_install:
diff --git a/3EngineExecutable/src/LightScene/LightScene.cpp b/3EngineExecutable/src/LightScene/LightScene.cpp
index 8700012..57b1175 100644
--- a/3EngineExecutable/src/LightScene/LightScene.cpp
+++ b/3EngineExecutable/src/LightScene/LightScene.cpp
@@ -4,6 +4,7 @@
  * Copyright (C) Ricardo Rodrigues 2017 - All Rights Reserved
  */
 #include <cmath>
+#include <ctime>
 #include "LightScene.h"
 
 #include "../../../3Engine/src/Shapes/MeshLoader.h"
diff --git a/3EngineTests/src/MatrixTests.h b/3EngineTests/src/MatrixTests.h
index 86e0d21..86f497b 100644
--- a/3EngineTests/src/MatrixTests.h
+++ b/3EngineTests/src/MatrixTests.h
@@ -245,14 +245,14 @@ SCENARIO("matrix arithmetic testing", "[matrix]") {
             THEN("vector +-*/ number") {
 
                 CHECK((m + 1.0f) == Matrix(2));
-                CHECK((m - 1.0f) == Matrix((const number) 0));
+                CHECK((m - 1.0f) == Matrix((number) 0));
                 CHECK((m * 2.0f) == Matrix(2));
                 CHECK((m / 2.0f) == Matrix(.5f));
             }
 
             THEN("number +-*/ vector") {
                 CHECK((1.0f + m) == Matrix(2));
-                CHECK((1.0f - m) == Matrix((const number) 0));
+                CHECK((1.0f - m) == Matrix((number) 0));
                 CHECK((2.0f * m) == Matrix(2));
                 CHECK((2.0f / m) == Matrix(2));
             }