diff --git a/vafator/__init__.py b/vafator/__init__.py
index b2400ec..2f19ce5 100755
--- a/vafator/__init__.py
+++ b/vafator/__init__.py
@@ -1 +1 @@
-VERSION='1.3.0'
\ No newline at end of file
+VERSION='1.3.1'
\ No newline at end of file
diff --git a/vafator/command_line.py b/vafator/command_line.py
index 0f26ddf..b3c3825 100755
--- a/vafator/command_line.py
+++ b/vafator/command_line.py
@@ -115,7 +115,7 @@ def vafator2decifer():
                         help="BED file of genomic regions to exclude")
     parser.add_argument("-p", "--min_purity", required=False, default=0.0, type=float,
                         help="minimum purity to consider samples")
-    parser.add_argument("-S", "--snp_file", required=False, default=None, type=str,
+    parser.add_argument("--snp_file", required=False, default=None, type=str,
                         help="HATCHet file containing germline SNP counts in tumor samples, baf/tumor.1bed")
     args = parser.parse_args()
     run_vafator2decifer(args)