diff --git a/README.md b/README.md
index 335e5d5..c1aff1e 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ $ sudo apt-get install texlive-full
 
 Download [MacTeX.pkg](http://tug.org/mactex/), and install it.
 
-- Windowns
+- Windows
       
 Download [CTEX-full](http://www.ctex.org/CTeXDownload), and install it.
 
diff --git a/tensorflow-internals.pdf b/tensorflow-internals.pdf
index bdc64fa..eb1d846 100644
Binary files a/tensorflow-internals.pdf and b/tensorflow-internals.pdf differ