diff --git a/src/Makefile b/src/Makefile
index 0d2aa895..dedf616e 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -12,7 +12,7 @@ export STM32F4XX ?= 1
 # Set to 1 HYDRAFW_NFC to include HydraNFC extension support
 export HYDRAFW_NFC ?= 1
 export HYDRAFW_DEBUG ?= 0
-export FW_REVISION := $(shell python build-scripts/hydrafw-revision.py)
+export FW_REVISION := $(shell python3 build-scripts/hydrafw-revision.py)
 
 HYDRAFW_OPTS =
 
@@ -316,19 +316,19 @@ FORCE:
 ifeq ($(USE_VERBOSE_COMPILE),yes)
 	echo Creating ./common/hydrafw_version.hdr
 	-rm -f $(OBJDIR)/common.o
-    python build-scripts/hydrafw-version.py ./common/hydrafw_version.hdr
+    python3 build-scripts/hydrafw-version.py ./common/hydrafw_version.hdr
 else
 	@echo Creating ./common/hydrafw_version.hdr
 	@rm -f $(OBJDIR)/common.o
-	@python build-scripts/hydrafw-version.py ./common/hydrafw_version.hdr
+	@python3 build-scripts/hydrafw-version.py ./common/hydrafw_version.hdr
 endif
 
 %.dfu: %.hex $(LDSCRIPT)
 ifeq ($(USE_VERBOSE_COMPILE),yes)
-	python build-scripts/dfu-convert.py -r $(FW_REVISION) -i $< $@
+	python3 build-scripts/dfu-convert.py -r $(FW_REVISION) -i $< $@
 else
 	@echo Creating $@
-	@python build-scripts/dfu-convert.py -r $(FW_REVISION) -i $< $@
+	@python3 build-scripts/dfu-convert.py -r $(FW_REVISION) -i $< $@
 endif
 
 # This rule hook is defined in the ChibiOS build system
diff --git a/src/build-scripts/dfu-convert.py b/src/build-scripts/dfu-convert.py
index 6e7f635b..f23482fa 100644
--- a/src/build-scripts/dfu-convert.py
+++ b/src/build-scripts/dfu-convert.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python2
+#!/usr/bin/env python3
 
 # Written by Antonio Galea - 2010/11/18
 # Distributed under Gnu LGPL 3.0
diff --git a/src/build-scripts/hydrafw-revision.py b/src/build-scripts/hydrafw-revision.py
index 9285a25b..b265fa85 100644
--- a/src/build-scripts/hydrafw-revision.py
+++ b/src/build-scripts/hydrafw-revision.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 from git import *
 import re
 
diff --git a/src/build-scripts/hydrafw-version.py b/src/build-scripts/hydrafw-version.py
index fbd2da33..85740bf9 100644
--- a/src/build-scripts/hydrafw-version.py
+++ b/src/build-scripts/hydrafw-version.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 import sys
 from optparse import OptionParser
 from datetime import *