diff --git a/isomorphism-class.cabal b/isomorphism-class.cabal
--- a/isomorphism-class.cabal
+++ b/isomorphism-class.cabal
@@ -1,7 +1,7 @@
 cabal-version: 3.0
 
 name: isomorphism-class
-version: 0.1
+version: 0.1.0.1
 synopsis: Isomorphism typeclass solving the conversion problem
 homepage: https://github.com/nikita-volkov/isomorphism-class
 bug-reports: https://github.com/nikita-volkov/isomorphism-class/issues
@@ -55,7 +55,7 @@
   other-modules:
     Test.ExtraInstances
   build-depends:
-    bytestring,
+    bytestring >=0.11,
     isomorphism-class,
     QuickCheck >=2.13 && <3,
     quickcheck-instances ==0.3.27,
diff --git a/library/IsomorphismClass.hs b/library/IsomorphismClass.hs
--- a/library/IsomorphismClass.hs
+++ b/library/IsomorphismClass.hs
@@ -197,6 +197,7 @@
 instance IsomorphicTo Text Text where
   to = id
 
+-- | Performs replacement on invalid Unicode chars in the string.
 instance IsomorphicTo Text String where
   to = Text.pack
 
@@ -211,6 +212,7 @@
 instance IsomorphicTo TextLazy.Text TextLazy.Text where
   to = id
 
+-- | Performs replacement on invalid Unicode chars in the string.
 instance IsomorphicTo TextLazy.Text String where
   to = TextLazy.pack
 
@@ -225,6 +227,7 @@
 instance IsomorphicTo TextLazyBuilder.Builder TextLazyBuilder.Builder where
   to = id
 
+-- | Performs replacement on invalid Unicode chars in the string.
 instance IsomorphicTo TextLazyBuilder.Builder String where
   to = TextLazyBuilder.fromString