diff --git a/Project.toml b/Project.toml
index 930b4bb..5231fef 100644
--- a/Project.toml
+++ b/Project.toml
@@ -12,7 +12,7 @@ SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
-DataStructures = "0.18"
+DataStructures = "0.18, 0.19"
 Lazy="0.15"
 Graphs = "1.8"
 MathOptInterface = "1.6"