diff --git a/README.rst b/README.rst
index 683092c4..a05d4822 100644
--- a/README.rst
+++ b/README.rst
@@ -70,7 +70,7 @@ that they can do.
 
 TUF is designed to perform the first two steps of the above update procedure,
 while guarding against the majority of attacks that malicious actors have at
-their disposable; especially those attacks that are overlooked by security-conscious
+their disposal; especially those attacks that are overlooked by security-conscious
 developers.