diff --git a/Project.toml b/Project.toml
index 57c13443..07e8c873 100644
--- a/Project.toml
+++ b/Project.toml
@@ -47,7 +47,7 @@ JSON = "0.19 - 0.21, 1"
 LinearAlgebra = "<0.0.1, 1"
 MacroTools = "0.5"
 Mooncake = "0.5.27"
-OrderedCollections = "1.8.1"
+OrderedCollections = "1.8.1, 2"
 Random = "1.6"
 StatsBase = "0.32, 0.33, 0.34"
 Test = "1"