diff --git a/REQUIRE b/REQUIRE
index 6226c8bb..43696af6 100644
--- a/REQUIRE
+++ b/REQUIRE
@@ -5,3 +5,4 @@ TextParse 0.1.6
 Dagger 0.2.0
 Glob 1.1.1
 PooledArrays 0.0.2
+NullableArrays