diff --git a/analysis/scripts/chromosomeMutator.py b/analysis/scripts/chromosomeMutator.py
index 9ff973c9..404c0b96 100644
--- a/analysis/scripts/chromosomeMutator.py
+++ b/analysis/scripts/chromosomeMutator.py
@@ -1,3 +1,5 @@
+#!/usr/bin/python2
+
 def chromosomeMutator(chromosome,heterozygosity):
 	import random
 	A="CGT"
diff --git a/analysis/scripts/parameteranalysis.py b/analysis/scripts/parameteranalysis.py
index 0e5be3e1..c918805b 100644
--- a/analysis/scripts/parameteranalysis.py
+++ b/analysis/scripts/parameteranalysis.py
@@ -1,6 +1,6 @@
+#!/usr/bin/python2
 #Given a reference sequence, introduce a  given rate of heterozygosity and create Illumina reads based on the wanted coverage level, readlength, and read duplication level.
 
-#!/usr/bin/python
 import os
 import os.path
 import gzip
diff --git a/analysis/scripts/run_jelly.py b/analysis/scripts/run_jelly.py
index e735f670..1c1e2a51 100644
--- a/analysis/scripts/run_jelly.py
+++ b/analysis/scripts/run_jelly.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python2
 import os
 import os.path
 import sys