diff --git a/benchmark/Project.toml b/benchmark/Project.toml
index 8be439047..68499e170 100644
--- a/benchmark/Project.toml
+++ b/benchmark/Project.toml
@@ -16,6 +16,7 @@ SparseMatrixColorings = "0a514795-09f3-496d-8182-132a7b665d35"
 UnoSolver = "1baa60ac-02f7-4b39-a7a8-2f4f58486b05"
 
 [compat]
+Ipopt = "1.16.0"
 UnoSolver = "0.3.8"
 Random = "<0.0.1, 1"
 LinearAlgebra = "<0.0.1, 1"