diff --git a/README.md b/README.md
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@@ -147,7 +147,7 @@ In your answer you can mention one or more of the following:
 <details>
 <summary>Explain mutable vs. immutable infrastructure</summary><br><b>
 
-In mutable infrastructure paradigm, changes applied on top of the existing infrastructure and over time
+In mutable infrastructure paradigm, changes are applied on top of the existing infrastructure and over time
 the infrastructure builds up a history of changes. Ansible, Puppet and Chef are examples to tools which
 follow mutable infrastructure paradigm.