diff --git a/Project.toml b/Project.toml
index b726611..472973d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -28,7 +28,7 @@ HDF5 = "0.15, 0.17"
 HTTP = "1"
 Interpolations = "0.13, 0.15, 0.16"
 Logging = "1"
-OrderedCollections = "1.5"
+OrderedCollections = "1.5, 2.0"
 RecipesBase = "1.1"
 SafeTestsets = "0.1"
 Scratch = "1"