diff --git a/src/Canvas.js b/src/Canvas.js
index edeb4d9..5ede330 100644
--- a/src/Canvas.js
+++ b/src/Canvas.js
@@ -10,7 +10,6 @@
 
   Will most likely be turned into a stand alone module at some point
  */
-'use strict';
 import bresenham from 'bresenham';
 import earcut from 'earcut';
 import BrailleBuffer from './BrailleBuffer.js';
diff --git a/src/Renderer.js b/src/Renderer.js
index 36bb578..7c9962f 100644
--- a/src/Renderer.js
+++ b/src/Renderer.js
@@ -4,7 +4,6 @@
 
   The Console Vector Tile renderer - bäm!
 */
-'use strict';
 import x256 from 'x256';
 import simplify from 'simplify-js';
 
diff --git a/src/TileSource.spec.js b/src/TileSource.spec.js
index bfd54f7..de4210b 100644
--- a/src/TileSource.spec.js
+++ b/src/TileSource.spec.js
@@ -1,4 +1,3 @@
-'use strict';
 import TileSource from './TileSource.js';
 
 describe('TileSource', () => {
diff --git a/src/utils.spec.js b/src/utils.spec.js
index 2784191..6ddbd17 100644
--- a/src/utils.spec.js
+++ b/src/utils.spec.js
@@ -1,4 +1,3 @@
-'use strict';
 import * as utils from './utils.js';
 
 describe('utils', () => {