diff --git a/processing/post/addCumulative.py b/processing/post/addCumulative.py
index 4588d915c..dfa8059dc 100755
--- a/processing/post/addCumulative.py
+++ b/processing/post/addCumulative.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.7
+#!/usr/bin/env python3
 # -*- coding: UTF-8 no BOM -*-
 
 import os,sys
diff --git a/processing/post/addDerivative.py b/processing/post/addDerivative.py
index dc97c09ea..35ca7130b 100755
--- a/processing/post/addDerivative.py
+++ b/processing/post/addDerivative.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.7
+#!/usr/bin/env python3
 # -*- coding: UTF-8 no BOM -*-
 
 import os,sys
diff --git a/processing/post/blowUp.py b/processing/post/blowUp.py
index 5a0d631e0..22de70d5b 100755
--- a/processing/post/blowUp.py
+++ b/processing/post/blowUp.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2.7
+#!/usr/bin/env python3
 # -*- coding: UTF-8 no BOM -*-
 
 import os,sys