README.md in pdfkit-0.4.1 vs README.md in pdfkit-0.4.2

- old
+ new
@@ -31,10 +31,10 @@
     # Stylesheets can not be added when source is provided as a URL of File.
     kit = PDFKit.new('http://google.com')
     kit = PDFKit.new(File.new('/path/to/html'))
 
     # Add any kind of option through meta tags
-    PDFKit.new('<html><head><meta name="pdfkit-page-size" content="Letter")
+    PDFKit.new('<html><head><meta name="pdfkit-page_size" content="Letter")
     
 ## Configuration
 
 If you're on Windows or you installed wkhtmltopdf by hand to a location other than /usr/local/bin you will need to tell PDFKit where the binary is. You can configure PDFKit like so:
 