diff --git a/isomorphism-class.cabal b/isomorphism-class.cabal
--- a/isomorphism-class.cabal
+++ b/isomorphism-class.cabal
@@ -1,6 +1,6 @@
 cabal-version: 3.0
 name: isomorphism-class
-version: 0.2.0.2
+version: 0.2.0.3
 synopsis: Lawful typeclasses for conversion between types
 category: Conversion
 homepage: https://github.com/nikita-volkov/isomorphism-class
diff --git a/library/IsomorphismClass/Classes/IsSome.hs b/library/IsomorphismClass/Classes/IsSome.hs
--- a/library/IsomorphismClass/Classes/IsSome.hs
+++ b/library/IsomorphismClass/Classes/IsSome.hs
@@ -26,7 +26,7 @@
 -- For testing whether your instances conform to these laws use 'IsomorphismClass.isSomeLawsProperties'.
 class IsSome sup sub where
   -- |
-  -- Convert a value a subset type to a superset type.
+  -- Convert a value of a subset type to a superset type.
   --
   -- This function is injective non-surjective.
   to :: sub -> sup