diff --git a/README.md b/README.md
index b0a42619..ba9819dc 100644
--- a/README.md
+++ b/README.md
@@ -62,12 +62,12 @@ Building requires Python (some code is generated).
  Download and install:
 
  - msys - http://sourceforge.net/projects/mingw/files/MSYS/Base/msys-core/msys-1.0.11/MSYS-1.0.11.exe
- - Python - http://www.python.org/ftp/python/2.7/python-2.7.msi (any 2.7 release)
+ - Python - https://www.python.org/downloads/windows/ (any release)
  - arm-none-eabi/arm-elf toolchain (for example this one https://launchpad.net/gcc-arm-embedded)
 
-Run msys shell and set the path without standard Windows paths, so Windows programs such as 'find' won't interfere:
+Run msys shell and set the path without standard Windows paths (adjusting to your version of Python), so Windows programs such as 'find' won't interfere:
 
-    export PATH="/c//Python27:/c/ARMToolchain/bin:/usr/local/bin:/usr/bin:/bin"
+    export PATH="/c//Program Files/Python 3.9:/c/ARMToolchain/bin:/usr/local/bin:/usr/bin:/bin"
 
 After that you can navigate to the folder where you've extracted libopencm3 and build it.
 
diff --git a/scripts/data/lpc43xx/csv2yaml.py b/scripts/data/lpc43xx/csv2yaml.py
index 7b2f8c6d..f8918012 100755
--- a/scripts/data/lpc43xx/csv2yaml.py
+++ b/scripts/data/lpc43xx/csv2yaml.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 import yaml
diff --git a/scripts/data/lpc43xx/gen.py b/scripts/data/lpc43xx/gen.py
index af253ddc..286b01ec 100755
--- a/scripts/data/lpc43xx/gen.py
+++ b/scripts/data/lpc43xx/gen.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import sys
 import yaml
diff --git a/scripts/gendoxylayout.py b/scripts/gendoxylayout.py
index 24154958..5ae63ebb 100755
--- a/scripts/gendoxylayout.py
+++ b/scripts/gendoxylayout.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # This python program generates parameters for the linker script generator feature.
 
 # This file is part of the libopencm3 project.
diff --git a/scripts/genlink.py b/scripts/genlink.py
index 96c27e08..9975b132 100755
--- a/scripts/genlink.py
+++ b/scripts/genlink.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # This python program generates parameters for the linker script generator feature.
 
 # This file is part of the libopencm3 project.
diff --git a/scripts/irq2nvic_h b/scripts/irq2nvic_h
index 8a1c355c..dbd62018 100755
--- a/scripts/irq2nvic_h
+++ b/scripts/irq2nvic_h
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # This file is part of the libopencm3 project.
 # 
diff --git a/scripts/lpcvtcksum b/scripts/lpcvtcksum
index 27dc8a77..85dfe8b1 100755
--- a/scripts/lpcvtcksum
+++ b/scripts/lpcvtcksum
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python2
 #
 # Compute and insert the vector table checksum required for booting the
 # LPC43xx and some other NXP ARM microcontrollers.