diff --git a/REQUIRE b/REQUIRE
index 63177c3..cac4d7d 100644
--- a/REQUIRE
+++ b/REQUIRE
@@ -1,4 +1,4 @@
 julia 0.5
 Compat 0.18.0
 Polynomials
-Iterators
+IterTools
diff --git a/src/Combinatorics.jl b/src/Combinatorics.jl
index 90ca353..679572c 100644
--- a/src/Combinatorics.jl
+++ b/src/Combinatorics.jl
@@ -2,7 +2,7 @@ __precompile__(true)
 
 module Combinatorics
 
-using Compat, Polynomials, Iterators
+using Compat, Polynomials, IterTools
 
 import Base: start, next, done, length, eltype