Update README.md

README.md

@@ -147,7 +147,7 @@ During the analysis procedure,  you might encounter the following problems due t
 ***1. Several packages can not be installed with errors returned, how to fix this?***<br/>
 __Answer__: Yes, the R pakcages' installation is indeed painful. Mostly you can restart your computer or change the network environment to go thought it easily; If problem still exist, please try to installing packages locally  or contacting authors for help;<br/>
 ***2. "Error : unrecognized fields specified in html_dependency: attachment" while clicks the download report button***:<br/>
-__Answer__: This error is mainly caused by Rstudio version; you can fixed it by upgrading your RStudio to the latest version.<br/>
+__Answer__: This error is mainly caused by Rstudio version; you can fix it by upgrading your RStudio to the latest version.<br/>
 ***3. "Error: pandoc version 1.12.3 or higher is required and was not found." while clicks the download report button***:<br/>
 __Answer__: If you see this message that means you upgraded your Rstudio version, the problem is still exist. This means you need a pandoc to render Rmd file into html report. You can install it from [https://github.com/jgm/pandoc/releases/tag/1.15.0.6](https://github.com/jgm/pandoc/releases/tag/1.15.0.6) as YiHui suggested. Then restart your Rstudio.