diff --git a/run.py b/run.py
index ebc725b..d3fb560 100755
--- a/run.py
+++ b/run.py
@@ -33,10 +33,11 @@ def main():
     remain = args.experiments
     while remain > 0:
         if args.utilization is not None:
-            subprocess.call(['./tasksetgen.py', '--microseconds', '--uniform', '5',
-                             '--utilization {}:{}'.format(args.utilization - 0.25, args.utilization + 0.25),
-                            str(remain), 'experiments/ese2016_{}'.format(cnt),
-                            'experiment_data'])
+            utilization = '--utilization {} {}'.format(args.utilization - 0.25, args.utilization + 0.25)
+            subprocess.call(['./tasksetgen.py', '--microseconds', '--utilization', str(args.utilization - 0.25),
+                             str(args.utilization + 0.25), '--uniform', '5',
+                             str(remain), 'experiments/ese2016_{}'.format(cnt),
+                             'experiment_data'])
         else:
             subprocess.call(['./tasksetgen.py', '--microseconds', '--uniform', '5',
                             str(remain), 'experiments/ese2016_{}'.format(cnt),
diff --git a/tasksetgen.py b/tasksetgen.py
index ac3af51..c89f6e9 100755
--- a/tasksetgen.py
+++ b/tasksetgen.py
@@ -129,7 +129,7 @@ def main():
     parser.add_argument('experiment_target', type=str, help='Output directory for experiments.', nargs='?',
                         default='.')
 
-    parser.add_argument('--utility', type=str, help='The utility for which tasksets should be generated. Is a range such as 2.5:3.5', nargs=1)
+    parser.add_argument('--utilization', type=float, help='The utility for which tasksets should be generated. Is a range such as 2.5 3.5', nargs=2)
 
     parser.add_argument('--baseclock', type=str, default='system_clock',
                         nargs='?',
@@ -179,12 +179,7 @@ def main():
 
     utility = None
     try:
-        utility_val = args.utility.split(':')
-        if len(utility_val > 3):
-            print('Invalid utility specified.', file=sys.sterr)
-            sys.exit(1)
-
-        utility = [float(util) for util in utility_val]
+        utility = args.utilization
     except AttributeError:
         pass