diff --git a/lib/OptimizationQuadDIRECT/Project.toml b/lib/OptimizationQuadDIRECT/Project.toml
index dcb666cd2..6b8768ea2 100644
--- a/lib/OptimizationQuadDIRECT/Project.toml
+++ b/lib/OptimizationQuadDIRECT/Project.toml
@@ -9,7 +9,7 @@ QuadDIRECT = "dae52e8d-d666-5120-a592-9e15c33b8d7a"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 
 [compat]
-Optimization = "3.21"
+Optimization = "3.21, 4"
 Reexport = "1.2"
 julia = "1"