diff --git a/Project.toml b/Project.toml
index d16c2f1..a328956 100644
--- a/Project.toml
+++ b/Project.toml
@@ -12,6 +12,7 @@ OrderedCollections = "bac558e1-5e72-5ebc-8fee-abe8a469f55d"
 
 [compat]
 MathOptInterface = "1.31"
+OrderedCollections = "1"
 julia = "1.6"
 
 [extras]