diff --git a/Project.toml b/Project.toml
index 58164ce..983b234 100644
--- a/Project.toml
+++ b/Project.toml
@@ -15,7 +15,7 @@ TableMetadataTools = "9ce81f87-eacc-4366-bf80-b621a3098ee2"
 Chain = "0.5, 0.6, 1"
 DataFrames = "1"
 MacroTools = "0.5"
-OrderedCollections = "1"
+OrderedCollections = "1, 2.0"
 PrettyTables = "2, 3"
 Reexport = "0.2, 1"
 TableMetadataTools = "0.1"