diff --git a/tox.ini b/tox.ini
index d93281bd..97a1af22 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,7 +22,7 @@ deps =
     cvxopt >=1.2.6
     ecos >=2.0.8
     flake8 >=6.0.0
-    gurobipy >=9.5.2
+    gurobipy ~=9.5.2
     isort >=5.8.0
     mypy >=0.812
     numpy <1.24.0