diff --git a/REQUIRE b/REQUIRE
index 1c07639e..7207d0f5 100644
--- a/REQUIRE
+++ b/REQUIRE
@@ -5,4 +5,3 @@ WoodburyMatrices 0.1.5
 Ratios
 AxisAlgorithms
 Compat 0.49
-DualNumbers
diff --git a/src/b-splines/indexing.jl b/src/b-splines/indexing.jl
index b704d6fc..d34719b6 100644
--- a/src/b-splines/indexing.jl
+++ b/src/b-splines/indexing.jl
@@ -1,5 +1,4 @@
 using Base.Cartesian
-using DualNumbers
 
 import Base.getindex
 
diff --git a/test/REQUIRE b/test/REQUIRE
index dbe36550..b9f1e8af 100644
--- a/test/REQUIRE
+++ b/test/REQUIRE
@@ -1 +1,2 @@
 OffsetArrays
+DualNumbers