diff --git a/library/Text/Builder.hs b/library/Text/Builder.hs
--- a/library/Text/Builder.hs
+++ b/library/Text/Builder.hs
@@ -29,10 +29,15 @@
   utf8CodeUnits3,
   utf8CodeUnits4,
   -- ** Integers
+  -- *** Decimal
   decimal,
   unsignedDecimal,
   thousandSeparatedDecimal,
   thousandSeparatedUnsignedDecimal,
+  -- *** Binary
+  unsignedBinary,
+  unsignedPaddedBinary,
+  -- *** Hexadecimal
   hexadecimal,
   unsignedHexadecimal,
   -- ** Digits
@@ -255,6 +260,18 @@
     if mod index 3 == 0 && index /= 0
       then return (decimalDigit digit <> char separatorChar)
       else return (decimalDigit digit)
+
+{-| Unsigned binary number -}
+{-# INLINE unsignedBinary #-}
+unsignedBinary :: Integral a => a -> Builder
+unsignedBinary =
+  foldMap decimalDigit . Unfoldr.binaryDigits
+
+{-| Unsigned binary number -}
+{-# INLINE unsignedPaddedBinary #-}
+unsignedPaddedBinary :: (Integral a, FiniteBits a) => a -> Builder
+unsignedPaddedBinary a =
+  padFromLeft (finiteBitSize a) '0' $ foldMap decimalDigit $ Unfoldr.binaryDigits a
 
 {-| Hexadecimal representation of an integral value -}
 {-# INLINE hexadecimal #-}
diff --git a/text-builder.cabal b/text-builder.cabal
--- a/text-builder.cabal
+++ b/text-builder.cabal
@@ -1,5 +1,5 @@
 name: text-builder
-version: 0.6.3
+version: 0.6.4
 category: Text
 synopsis: An efficient strict text builder
 homepage: https://github.com/nikita-volkov/text-builder
@@ -25,7 +25,7 @@
     base >=4.9 && <5,
     base-prelude <2,
     bytestring >=0.10 && <0.11,
-    deferred-folds >=0.9 && <0.10,
+    deferred-folds >=0.9.9 && <0.10,
     semigroups >=0.18 && <0.19,
     text >=1 && <2,
     transformers >=0.5 && <0.6