diff --git a/README.md b/README.md
index 61f2585..0955c07 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@
 **Boost your development and feel free to use your imagination!**
 
 ### Learn ###
-- Website: Find out more about PixiJS on the [offical website](http://www.pixijs.com/).
+- Website: Find out more about PixiJS on the [official website](http://www.pixijs.com/).
 - Getting started: Check out @kittykatattack's comprehensive [tutorial](https://github.com/kittykatattack/learningPixi).
 - Examples: Get stuck right in and play around with PixiJS code and features right [here](http://pixijs.github.io/examples/)!
 - Docs: Get to know the PixiJS API by checking out the [docs](https://pixijs.github.io/docs/).

diff --git a/README.md b/README.md
index 61f2585..0955c07 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@
 **Boost your development and feel free to use your imagination!**
 
 ### Learn ###
-- Website: Find out more about PixiJS on the [offical website](http://www.pixijs.com/).
+- Website: Find out more about PixiJS on the [official website](http://www.pixijs.com/).
 - Getting started: Check out @kittykatattack's comprehensive [tutorial](https://github.com/kittykatattack/learningPixi).
 - Examples: Get stuck right in and play around with PixiJS code and features right [here](http://pixijs.github.io/examples/)!
 - Docs: Get to know the PixiJS API by checking out the [docs](https://pixijs.github.io/docs/).
diff --git a/packages/core/src/mask/StencilSystem.js b/packages/core/src/mask/StencilSystem.js
index bf9ddae..4c4856b 100644
--- a/packages/core/src/mask/StencilSystem.js
+++ b/packages/core/src/mask/StencilSystem.js
@@ -62,7 +62,7 @@
 
         this.stencilMaskStack.push(graphics);
 
-        // Increment the refference stencil value where the new mask overlaps with the old ones.
+        // Increment the reference stencil value where the new mask overlaps with the old ones.
         gl.colorMask(false, false, false, false);
         gl.stencilFunc(gl.EQUAL, prevMaskCount, this._getBitwiseMask());
         gl.stencilOp(gl.KEEP, gl.KEEP, gl.INCR);
@@ -92,7 +92,7 @@
         }
         else
         {
-            // Decrement the refference stencil value where the popped mask overlaps with the other ones
+            // Decrement the reference stencil value where the popped mask overlaps with the other ones
             gl.colorMask(false, false, false, false);
             gl.stencilOp(gl.KEEP, gl.KEEP, gl.DECR);