diff --git a/bin/args.py b/bin/args.py
index 0366b5a66633c2e1b02d560ea0a83e968109e4d9..0c535406dae3cb78552c73bdf1855fc380aa2ce7 100644
--- a/bin/args.py
+++ b/bin/args.py
@@ -38,9 +38,9 @@ def parse():
                         help="number of nodes for trapezoidal rule")
     parser.add_argument("-maxIt", type=int, default=10,
                         help="maximam number of iterations")
-    parser.add_argument("-lStart", type=int, default=1,
+    parser.add_argument("-lStart", type=int, default=4,
                         help="initial size of col(A0)")
-    parser.add_argument("-lStep", type=int, default=1,
+    parser.add_argument("-lStep", type=int, default=3,
                         help="step size for increasing col(A0)")
     parser.add_argument("-rankTol", type=float, default=1e-4,
                         help="relative tolerance for rank test")