diff --git a/Project.toml b/Project.toml
index 811c142..1029983 100644
--- a/Project.toml
+++ b/Project.toml
@@ -27,6 +27,7 @@ DiskArrays = "0.3"
 Interpolations = "0.14"
 Ipopt = "1"
 OffsetArrays = "1"
+OnlineStats = "1"
 Optimization = "3"
 OptimizationMOI = "0.1"
 OptimizationOptimJL = "0.1"