diff --git a/library/TextBuilderDev.hs b/library/TextBuilderDev.hs
--- a/library/TextBuilderDev.hs
+++ b/library/TextBuilderDev.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE CPP #-}
+
 module TextBuilderDev
   ( TextBuilder,
 
@@ -88,6 +90,10 @@
 import qualified TextBuilderDev.Allocator as Allocator
 import TextBuilderDev.Prelude hiding (intercalate, length, null)
 
+#if MIN_VERSION_text(2,0,2)
+import qualified Data.Text.Encoding as TextEncoding
+#endif
+
 -- * --
 
 -- |
@@ -138,6 +144,12 @@
   toTextBuilder = text . TextLazy.toStrict . TextLazyBuilder.toLazyText
   fromTextBuilder = TextLazyBuilder.fromText . buildText
 
+#if MIN_VERSION_text(2,0,2)
+instance IsomorphicToTextBuilder TextEncoding.StrictBuilder where
+  toTextBuilder = toTextBuilder . TextEncoding.strictBuilderToText
+  fromTextBuilder = TextEncoding.textToStrictBuilder . fromTextBuilder
+#endif
+
 -- * --
 
 -- |
@@ -583,6 +595,11 @@
 
 -- |
 -- Time interval in seconds.
+--
+-- The format is the following:
+--
+-- > DD:HH:MM:SS
+--
 -- Directly applicable to 'DiffTime' and 'NominalDiffTime'.
 {-# INLINEABLE intervalInSeconds #-}
 intervalInSeconds :: (RealFrac seconds) => seconds -> TextBuilder
diff --git a/text-builder-dev.cabal b/text-builder-dev.cabal
--- a/text-builder-dev.cabal
+++ b/text-builder-dev.cabal
@@ -1,6 +1,6 @@
 cabal-version: 3.0
 name:          text-builder-dev
-version:       0.3.4.4
+version:       0.3.4.5
 category:      Text, Builders
 synopsis:      Edge of developments for "text-builder"
 description: