diff --git a/create-archive.py b/create-archive.py
index 342dd659..7a6526a0 100755
--- a/create-archive.py
+++ b/create-archive.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys,os,subprocess,re
 from time import strftime
diff --git a/generate-scripts.py b/generate-scripts.py
index 1e1144eb..bb308d83 100755
--- a/generate-scripts.py
+++ b/generate-scripts.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # Francesco Conti <f.conti@unibo.it>
 #
 # Copyright (C) 2016 ETH Zurich, University of Bologna.
diff --git a/push-ips.py b/push-ips.py
index c9eae39f..c1e3dd98 100755
--- a/push-ips.py
+++ b/push-ips.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # Francesco Conti <f.conti@unibo.it>
 #
 # Copyright (C) 2016 ETH Zurich, University of Bologna.
diff --git a/sw/apps/riscv_tests/testALUExt/gen_stimuli.py b/sw/apps/riscv_tests/testALUExt/gen_stimuli.py
index c1209ef6..258d951a 100755
--- a/sw/apps/riscv_tests/testALUExt/gen_stimuli.py
+++ b/sw/apps/riscv_tests/testALUExt/gen_stimuli.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 import random
diff --git a/sw/apps/riscv_tests/testBitManipulation/gen_stimuli.py b/sw/apps/riscv_tests/testBitManipulation/gen_stimuli.py
index 4e61c6f3..8e631442 100755
--- a/sw/apps/riscv_tests/testBitManipulation/gen_stimuli.py
+++ b/sw/apps/riscv_tests/testBitManipulation/gen_stimuli.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 import random
diff --git a/sw/apps/riscv_tests/testCSR/gen_stimuli.py b/sw/apps/riscv_tests/testCSR/gen_stimuli.py
index ec75b4f6..3893af85 100755
--- a/sw/apps/riscv_tests/testCSR/gen_stimuli.py
+++ b/sw/apps/riscv_tests/testCSR/gen_stimuli.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 import random
diff --git a/sw/apps/riscv_tests/testShufflePack/gen_stimuli.py b/sw/apps/riscv_tests/testShufflePack/gen_stimuli.py
index 3e40e430..2b9e2a0b 100755
--- a/sw/apps/riscv_tests/testShufflePack/gen_stimuli.py
+++ b/sw/apps/riscv_tests/testShufflePack/gen_stimuli.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 import random
@@ -482,4 +482,4 @@ def pack_8_lo(prefix):
 
 pack_16        ('g_pack_h')
 pack_8_hi      ('g_pack_hi_b')
-pack_8_lo      ('g_pack_lo_b')
\ No newline at end of file
+pack_8_lo      ('g_pack_lo_b')
diff --git a/sw/apps/riscv_tests/testVecArith/gen_stimuli.py b/sw/apps/riscv_tests/testVecArith/gen_stimuli.py
index 90d2a5fe..0493ebe2 100755
--- a/sw/apps/riscv_tests/testVecArith/gen_stimuli.py
+++ b/sw/apps/riscv_tests/testVecArith/gen_stimuli.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 import random
@@ -843,4 +843,4 @@ def extu_8(a, L):
 instr_32_ri(fa,'g_extu_b0', extu_8,  0)
 instr_32_ri(fa,'g_extu_b1', extu_8,  1)
 instr_32_ri(fa,'g_extu_b2', extu_8,  2)
-instr_32_ri(fa,'g_extu_b3', extu_8,  3)
\ No newline at end of file
+instr_32_ri(fa,'g_extu_b3', extu_8,  3)
diff --git a/sw/apps/sequential_tests/matrixAdd/gen_stimuli.py b/sw/apps/sequential_tests/matrixAdd/gen_stimuli.py
index e6af7ca7..c6a206d2 100755
--- a/sw/apps/sequential_tests/matrixAdd/gen_stimuli.py
+++ b/sw/apps/sequential_tests/matrixAdd/gen_stimuli.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 import random
diff --git a/sw/apps/sequential_tests/matrixMul16/gen_stimuli.py b/sw/apps/sequential_tests/matrixMul16/gen_stimuli.py
index 2084a7d4..7c793b86 100755
--- a/sw/apps/sequential_tests/matrixMul16/gen_stimuli.py
+++ b/sw/apps/sequential_tests/matrixMul16/gen_stimuli.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 import random
diff --git a/sw/apps/sequential_tests/matrixMul32/gen_stimuli.py b/sw/apps/sequential_tests/matrixMul32/gen_stimuli.py
index 37fec1a6..cd6f719d 100755
--- a/sw/apps/sequential_tests/matrixMul32/gen_stimuli.py
+++ b/sw/apps/sequential_tests/matrixMul32/gen_stimuli.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 import random
diff --git a/sw/apps/sequential_tests/matrixMul8/gen_stimuli.py b/sw/apps/sequential_tests/matrixMul8/gen_stimuli.py
index 71451d85..2d9dad7f 100755
--- a/sw/apps/sequential_tests/matrixMul8/gen_stimuli.py
+++ b/sw/apps/sequential_tests/matrixMul8/gen_stimuli.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 import random
diff --git a/sw/apps/sequential_tests/matrixMul8_dotp/gen_stimuli.py b/sw/apps/sequential_tests/matrixMul8_dotp/gen_stimuli.py
index bdd13d80..8024335a 100755
--- a/sw/apps/sequential_tests/matrixMul8_dotp/gen_stimuli.py
+++ b/sw/apps/sequential_tests/matrixMul8_dotp/gen_stimuli.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 import random
diff --git a/sw/utils/annotate.py b/sw/utils/annotate.py
index ae8f45a1..49165613 100755
--- a/sw/utils/annotate.py
+++ b/sw/utils/annotate.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 
diff --git a/sw/utils/s19toboot.py b/sw/utils/s19toboot.py
index 677ed276..455d527c 100755
--- a/sw/utils/s19toboot.py
+++ b/sw/utils/s19toboot.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # ////////////////////////////////////////////////////////////////////////////////
 # // Company:        Multitherman Laboratory @ DEIS - University of Bologna     //
diff --git a/sw/utils/s19toslm.py b/sw/utils/s19toslm.py
index 7c459a43..3f646875 100755
--- a/sw/utils/s19toslm.py
+++ b/sw/utils/s19toslm.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 # ////////////////////////////////////////////////////////////////////////////////
 # // Company:        Multitherman Laboratory @ DEIS - University of Bologna     //
diff --git a/tag-ips.py b/tag-ips.py
index faf6f2f7..b9e272ed 100755
--- a/tag-ips.py
+++ b/tag-ips.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # Francesco Conti <f.conti@unibo.it>
 #
 # Copyright (C) 2016 ETH Zurich, University of Bologna.
diff --git a/update-ips.py b/update-ips.py
index 20e29573..07335f4f 100755
--- a/update-ips.py
+++ b/update-ips.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # Francesco Conti <f.conti@unibo.it>
 #
 # Copyright (C) 2016 ETH Zurich, University of Bologna.