diff --git a/Project.toml b/Project.toml
index 41b1f8f..e56d065 100644
--- a/Project.toml
+++ b/Project.toml
@@ -27,7 +27,7 @@ CSV = "0.8"
 CategoricalArrays = "0.9, 0.10"
 Combinatorics = "1.0"
 DataFrames = "1"
-Ipopt = "0.6, 0.7"
+Ipopt = "0.6, 0.7, 0.8"
 JSON = "0.21"
 JuMP = "0.21"
 MathOptInterface = "0.9"