Update 2017-12-0.22.md

website/src/_posts/2017-12-0.22.md

@@ -110,7 +110,7 @@ Also, we’ve fixed restoring from paused state. Now uploads will remain paused
 
 Uppy Server now uses TypeScript to do some type checking at compile time. This helps spot some otherwise easy to miss runtime bugs. While the project’s source is still written in JavaScript, the use of JSDoc specifications is leveraged by TypeScript to detect data types and mistakes with that, within the project.
 
-Thanks to this approach number of hidden bugs have already been identified and fixed, and it also makes Uppy Server very well documented. :)
+Thanks to this approach a number of hidden bugs have already been identified and fixed, and it also makes Uppy Server very well documented. :)
 
 ## And there’s more