diff --git a/Project.toml b/Project.toml
index 880603d..735a210 100644
--- a/Project.toml
+++ b/Project.toml
@@ -30,6 +30,7 @@ OffsetArrays = "1"
 Optimization = "3"
 OptimizationMOI = "0.1"
 OptimizationOptimJL = "0.1"
+OrderedCollections = "1"
 StatsBase = "0.34"
 Zarr = "0.9"
 julia = "1"