diff --git a/app/services/loft_service.py b/app/services/loft_service.py
index 2e5dd59..b78e7f4 100644
--- a/app/services/loft_service.py
+++ b/app/services/loft_service.py
@@ -93,9 +93,9 @@ class LoftService(Base):
       logging.info('Creating TIF and TCC constraints')
       for target in self.solver_run.objective_function.tif_targets:
         problem += lpSum([item.iif(self.solver_run, target.theta)*items[item.id]
-                         for item in self.solver_run.items]) >= target.value - target.value * 0.15, f'max tif theta ({target.theta}) target value {target.value}'
+                         for item in self.solver_run.items]) >= target.value - target.value * 0.2, f'max tif theta ({target.theta}) target value {target.value}'
         problem += lpSum([item.iif(self.solver_run, target.theta)*items[item.id]
-                         for item in self.solver_run.items]) <= target.value + target.value * 0.15, f'min tif theta ({target.theta}) target value {target.value}'
+                         for item in self.solver_run.items]) <= target.value + target.value * 0.2, f'min tif theta ({target.theta}) target value {target.value}'
 
       for target in self.solver_run.objective_function.tcc_targets:
         problem += lpSum([item.irf(self.solver_run, target.theta)*items[item.id]