diff --git a/REQUIRE b/REQUIRE
index bf48baaf..534b379c 100644
--- a/REQUIRE
+++ b/REQUIRE
@@ -1,5 +1,4 @@
 julia 0.6.0-pre
-Iterators
 DataFlow
 Juno
 MacroTools 0.3.3
diff --git a/src/data.jl b/src/data.jl
index 1a146eb7..bebf883e 100644
--- a/src/data.jl
+++ b/src/data.jl
@@ -22,15 +22,7 @@ onecold(y::AbstractVector, labels = 1:length(y)) =
 onecold(y::AbstractMatrix, l...) =
   squeeze(mapslices(y -> onecold(y, l...), y, 2), 2)
 
-using Iterators
-import Iterators: Partition, partition
-
-Base.length(l::Partition) = length(l.xs) ÷ l.step
-
-_partition(r::UnitRange, step::Integer) = (step*(i-1)+1:step*i for i in 1:(r.stop÷step))
-_partition(xs, step) = (xs[i] for i in _partition(1:length(xs), step))
-
-chunk(xs, n) = _partition(xs, length(xs)÷n)
+chunk(xs, n) = Base.Iterators.partition(xs, length(xs)÷n)
 
 batches(xs...) = (Batch(x) for x in zip(xs...))
 sequences(xs, len) = (Seq(x) for x in partition(xs, len))