diff --git a/lib/XSPECModels/test/Project.toml b/lib/XSPECModels/test/Project.toml
index 706ecfe9..758180a4 100644
--- a/lib/XSPECModels/test/Project.toml
+++ b/lib/XSPECModels/test/Project.toml
@@ -6,3 +6,6 @@ SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 SpectralFitting = "f2c56810-742e-4b72-8bf4-27af3bb81a12"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 XSPECModels = "e051c099-9e89-4e1f-aad2-39a4611ecf4d"
+
+[compat]
+OptimizationOptimJL = "0.4.15"