diff --git a/include/Makefile.am b/include/Makefile.am
index 27a40908a..38ba14cd3 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -162,7 +162,7 @@ osmocom/core/crc%gen.h: osmocom/core/crcXXgen.h.tpl
 	$(AM_V_GEN)sed -e's/XX/$*/g' $< > $@
 
 osmocom/gsm/gsm0503.h: $(top_srcdir)/utils/conv_gen.py $(top_srcdir)/utils/conv_codes_gsm.py
-	$(AM_V_GEN)python2 $(top_srcdir)/utils/conv_gen.py gen_header gsm \
+	$(AM_V_GEN)python $(top_srcdir)/utils/conv_gen.py gen_header gsm \
 		--target-path $(builddir)/osmocom/gsm
 
 CLEANFILES = osmocom/gsm/gsm0503.h
diff --git a/src/gsm/Makefile.am b/src/gsm/Makefile.am
index 0439ce623..5387e3abc 100644
--- a/src/gsm/Makefile.am
+++ b/src/gsm/Makefile.am
@@ -47,6 +47,6 @@ EXTRA_DIST = libosmogsm.map
 
 # Convolutional codes generation
 gsm0503_conv.c: $(top_srcdir)/utils/conv_gen.py $(top_srcdir)/utils/conv_codes_gsm.py
-	$(AM_V_GEN)python2 $(top_srcdir)/utils/conv_gen.py gen_codes gsm
+	$(AM_V_GEN)python $(top_srcdir)/utils/conv_gen.py gen_codes gsm
 
 CLEANFILES = gsm0503_conv.c
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 70b5cb81e..db4e52036 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -280,5 +280,5 @@ $(TESTSUITE): $(srcdir)/testsuite.at $(srcdir)/package.m4
 	mv $@.tmp $@
 
 conv/gsm0503_test_vectors.c: $(top_srcdir)/utils/conv_gen.py $(top_srcdir)/utils/conv_codes_gsm.py
-	$(AM_V_GEN)python2 $(top_srcdir)/utils/conv_gen.py gen_vectors gsm \
+	$(AM_V_GEN)python $(top_srcdir)/utils/conv_gen.py gen_vectors gsm \
 		--target-path $(builddir)/conv
diff --git a/utils/conv_codes_gsm.py b/utils/conv_codes_gsm.py
index eeed4fd0f..ec7766058 100644
--- a/utils/conv_codes_gsm.py
+++ b/utils/conv_codes_gsm.py
@@ -1,5 +1,6 @@
-#!/usr/bin/python2
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
+
 from conv_gen import ConvolutionalCode
 from conv_gen import poly
 
diff --git a/utils/conv_gen.py b/utils/conv_gen.py
index 6b6b26775..06283d878 100644
--- a/utils/conv_gen.py
+++ b/utils/conv_gen.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/env python
 
 mod_license = """
 /*