diff --git a/library/TextBuilderDev.hs b/library/TextBuilderDev.hs
--- a/library/TextBuilderDev.hs
+++ b/library/TextBuilderDev.hs
@@ -100,6 +100,9 @@
 instance ToTextBuilder String where
   toTextBuilder = fromString
 
+instance ToTextBuilder Char where
+  toTextBuilder = char
+
 -- *
 
 -- |
diff --git a/text-builder-dev.cabal b/text-builder-dev.cabal
--- a/text-builder-dev.cabal
+++ b/text-builder-dev.cabal
@@ -1,7 +1,7 @@
 cabal-version: 3.0
 
 name: text-builder-dev
-version: 0.2.0.1
+version: 0.2.1
 category: Text
 synopsis: Edge of developments for "text-builder"
 description: