diff --git a/Project.toml b/Project.toml
index 69c17fb..17ac72e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -20,6 +20,7 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 StatsFuns = "4c63d2b9-4356-54db-8cca-17b64c39e42c"
 
 [compat]
+OptimizationNLopt = "0.3"
 julia = "1.6.7"
 
 [extras]