diff --git a/01-what-and-why.html b/01-what-and-why.html
index d7a2384..9da8973 100644
--- a/01-what-and-why.html
+++ b/01-what-and-why.html
@@ -64,7 +64,7 @@ Why would I want to use Docker?
Imagine you are working on an analysis in R and you send your code to a friend. Your friend runs exactly this code on exactly the same data set but gets a slightly different result. This can have various reasons such as a different operating system, a different version of an R package, et cetera. Docker is trying to solve problems like that.
A Docker container can be seen as a computer inside your computer. The cool thing about this virtual computer is that you can send it to your friends; And when they start this computer and run your code they will get exactly the same results as you did.
In short, you should use Docker because
@@ -74,7 +74,7 @@ Why would I want to use Docker?
There are a couple of other points what Docker helps with:
-- Portability: Since a Docker container can easily be send to another machine, you can set up everything on your own computer and then run the analyses on e.g. a more powerful machine.
+- Portability: Since a Docker container can easily be sent to another machine, you can set up everything on your own computer and then run the analyses on e.g. a more powerful machine.
- Sharability: You can send the Docker container to anyone (who knows how to work with Docker).
diff --git a/files/computer.jpg b/files/computer.jpg
index 935b395..4a31acd 100644
Binary files a/files/computer.jpg and b/files/computer.jpg differ
+