diff --git a/Project.toml b/Project.toml
index ced2ac6c..0b3102ab 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, 0.6"
-OrderedCollections = "1.8.1"
+OrderedCollections = "1.8.1, 2.0"
 Random = "1.6"
 StatsBase = "0.32, 0.33, 0.34"
 Test = "1"
diff --git a/test/Project.toml b/test/Project.toml
index 122f7e4e..1a8c87e1 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -25,5 +25,5 @@ Documenter = "0.26.3, 0.27, 1"
 InvertedIndices = "1"
 JET = "0.9, 0.10, 0.11"
 OffsetArrays = "1"
-OrderedCollections = "1"
+OrderedCollections = "1, 2.0"
 julia = "1"