diff --git a/qspace.py b/qspace.py
index 2a26b14..7d81741 100644
--- a/qspace.py
+++ b/qspace.py
@@ -78,8 +78,14 @@ class QSpace3D(Device):
     def fit_ub(self, *args, **kwargs):
         self.dc.ub.fit_ub(*args, **kwargs) 
 
+    @property
     def UB(self):
-        self.dc.ub.UB 
+        self.dc.ub.UB
+
+    def set_constraints(self, **kwargs):
+        for name, value in kwargs.items():
+            setattr(self.dc.cons, name, value)
+
     # if I understand the examples/code correctly, then some more method calls are mandatory?
     # those should probably all get shortcuts...