diff --git a/README.md b/README.md
index c96d859..6d8e13c 100644
--- a/README.md
+++ b/README.md
@@ -130,7 +130,7 @@ Personally I prefer to be explicit about the dependent keys, but it doesn't real
 
 Derivations are processed in the order they are defined, and all `withDerivation` functions produce a new immutable Factory.
 
-If you wish to use an underlying factory's returned value for a given property as _input_ to derive a new value for the property, you can use `withSelfDerviation()`. This will ensure the key you are deriving has a valid starting value (not the case when using `withDerivation`).
+If you wish to use an underlying factory's returned value for a given property as _input_ to derive a new value for the property, you can use `withSelfDerivation()`. This will ensure the key you are deriving has a valid starting value (not the case when using `withDerivation`).
 
 Finally, you could instantiate a `Derived<TOwner,TProperty>` for the value of a property inside a `Factory.makeFactory` definition, but the type inference can't help you as much - you'll have to indicate the type of TOwner and TProperty.