diff --git a/mutect/filter_mutect.py b/mutect/filter_mutect.py
index aba06fb..d7856dd 100644
--- a/mutect/filter_mutect.py
+++ b/mutect/filter_mutect.py
@@ -44,7 +44,7 @@ def main():
    parser.add_argument("-tsn", "--tsampleName", action="store", dest="tsampleName", required=True, type=str,metavar='SomeName', help="Name of the tumor Sample")
    parser.add_argument("-dp", "--totaldepth", action="store", dest="dp", required=False, type=int, default=0, metavar='0', help="Tumor total depth threshold")
    parser.add_argument("-ad", "--alleledepth", action="store", dest="ad", required=False, type=int, default=5, metavar='5', help="Tumor allele depth threshold")
-   parser.add_argument("-tnr", "--tnRatio", action="store", dest="tnr", required=False, type=int, default=5, metavar='5', help="Tumor-Normal variant frequency ratio threshold ")
+   parser.add_argument("-tnr", "--tnRatio", action="store", dest="tnr", required=False, type=int, default=0, metavar='0', help="Tumor-Normal variant frequency ratio threshold ")
    parser.add_argument("-vf", "--variantfrequency", action="store", dest="vf", required=False, type=float, default=0.01, metavar='0.01', help="Tumor variant frequency threshold ")
    parser.add_argument("-hvcf", "--hotspotVcf", action="store", dest="hotspotVcf", required=False, type=str, metavar='hostpot.vcf', help="Input bgzip / tabix indexed hotspot vcf file to used for filtering")
    parser.add_argument("-o", "--outDir", action="store", dest="outdir", required=False, type=str, metavar='/somepath/output', help="Full Path to the output dir.")
diff --git a/pindel/filter_pindel.py b/pindel/filter_pindel.py
index 381d546..8a58689 100644
--- a/pindel/filter_pindel.py
+++ b/pindel/filter_pindel.py
@@ -87,8 +87,8 @@ def main():
         dest="tnr",
         required=False,
         type=int,
-        default=5,
-        metavar='5',
+        default=0,
+        metavar='0',
         help="Tumor-Normal variant frequency ratio threshold ")
     parser.add_argument(
         "-vf",
diff --git a/somaticindeldetector/filter_sid.py b/somaticindeldetector/filter_sid.py
index a7a6e0e..1c40392 100644
--- a/somaticindeldetector/filter_sid.py
+++ b/somaticindeldetector/filter_sid.py
@@ -95,8 +95,8 @@ def main():
         dest="tnr",
         required=False,
         type=int,
-        default=5,
-        metavar='5',
+        default=0,
+        metavar='0',
         help="Tumor-Normal variant frequency ratio threshold ")
     parser.add_argument(
         "-vf",
@@ -245,4 +245,4 @@ def checkHotspot(hotspotVcf, chromosome, start):
     end_time = time.time()
     totaltime = end_time - start_time
     logging.info("filter_sid: Elapsed time was %g seconds", totaltime)
-    sys.exit(0)
\ No newline at end of file
+    sys.exit(0)
diff --git a/vardict/filter_vardict.py b/vardict/filter_vardict.py
index b35e816..ec3540d 100644
--- a/vardict/filter_vardict.py
+++ b/vardict/filter_vardict.py
@@ -86,8 +86,8 @@ def main():
         dest="tnr",
         required=False,
         type=int,
-        default=5,
-        metavar='5',
+        default=0,
+        metavar='0',
         help="Tumor-Normal variant frequency ratio threshold ")
     parser.add_argument(
         "-vf",