diff --git a/devscripts/bash-completion.py b/devscripts/bash-completion.py
index a41aa4c62..46b4b2ff5 100755
--- a/devscripts/bash-completion.py
+++ b/devscripts/bash-completion.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 import os
diff --git a/devscripts/check-porn.py b/devscripts/check-porn.py
index 5e0072468..50f6bebc6 100644
--- a/devscripts/check-porn.py
+++ b/devscripts/check-porn.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 """
diff --git a/devscripts/create-github-release.py b/devscripts/create-github-release.py
index e5740f40e..53b3e0f48 100644
--- a/devscripts/create-github-release.py
+++ b/devscripts/create-github-release.py
@@ -1,6 +1,6 @@
 # Unused
 
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 import io
diff --git a/devscripts/fish-completion.py b/devscripts/fish-completion.py
index 5313c4a01..fb45e0280 100755
--- a/devscripts/fish-completion.py
+++ b/devscripts/fish-completion.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 import optparse
diff --git a/devscripts/generate_aes_testdata.py b/devscripts/generate_aes_testdata.py
index f9bb2ad3b..0979eee5b 100644
--- a/devscripts/generate_aes_testdata.py
+++ b/devscripts/generate_aes_testdata.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 import codecs
diff --git a/devscripts/gh-pages/update-copyright.py b/devscripts/gh-pages/update-copyright.py
index 61487f925..e122d0283 100755
--- a/devscripts/gh-pages/update-copyright.py
+++ b/devscripts/gh-pages/update-copyright.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from __future__ import with_statement, unicode_literals
diff --git a/devscripts/lazy_load_template.py b/devscripts/lazy_load_template.py
index c4e5fc1f4..d06655d10 100644
--- a/devscripts/lazy_load_template.py
+++ b/devscripts/lazy_load_template.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # coding: utf-8
 from __future__ import unicode_literals
 
diff --git a/devscripts/make_contributing.py b/devscripts/make_contributing.py
index b0cacbc4b..c7f3eef76 100755
--- a/devscripts/make_contributing.py
+++ b/devscripts/make_contributing.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 # import io
diff --git a/devscripts/make_issue_template.py b/devscripts/make_issue_template.py
index 13f337c82..902059231 100644
--- a/devscripts/make_issue_template.py
+++ b/devscripts/make_issue_template.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 import io
diff --git a/devscripts/make_lazy_extractors.py b/devscripts/make_lazy_extractors.py
index cc1cf0bd4..f13262f76 100644
--- a/devscripts/make_lazy_extractors.py
+++ b/devscripts/make_lazy_extractors.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import unicode_literals, print_function
 
 from inspect import getsource
diff --git a/devscripts/make_readme.py b/devscripts/make_readme.py
index 9cbf5b749..3f56af744 100755
--- a/devscripts/make_readme.py
+++ b/devscripts/make_readme.py
@@ -1,3 +1,8 @@
+#!/usr/bin/env python3
+
+# yt-dlp --help | make_readme.py
+# This must be run in a console of correct width
+
 from __future__ import unicode_literals
 
 import io
diff --git a/devscripts/make_supportedsites.py b/devscripts/make_supportedsites.py
index 12655bf89..17a34843f 100644
--- a/devscripts/make_supportedsites.py
+++ b/devscripts/make_supportedsites.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 import io
diff --git a/devscripts/prepare_manpage.py b/devscripts/prepare_manpage.py
index 4578a33ce..485b39e9f 100644
--- a/devscripts/prepare_manpage.py
+++ b/devscripts/prepare_manpage.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 import io
diff --git a/devscripts/show-downloads-statistics.py b/devscripts/show-downloads-statistics.py
index e76f1e4c8..4855aa7c8 100644
--- a/devscripts/show-downloads-statistics.py
+++ b/devscripts/show-downloads-statistics.py
@@ -1,6 +1,6 @@
 # Unused
 
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 import itertools
diff --git a/devscripts/update-version.py b/devscripts/update-version.py
index c6e7b5309..2d1673d0e 100644
--- a/devscripts/update-version.py
+++ b/devscripts/update-version.py
@@ -1,4 +1,6 @@
+#!/usr/bin/env python3
 from __future__ import unicode_literals
+
 from datetime import datetime
 # import urllib.request
 
diff --git a/devscripts/zsh-completion.py b/devscripts/zsh-completion.py
index 68d40014b..780df0de6 100755
--- a/devscripts/zsh-completion.py
+++ b/devscripts/zsh-completion.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 import os
diff --git a/pyinst.py b/pyinst.py
index b0b68e6c3..8f24fdaf6 100644
--- a/pyinst.py
+++ b/pyinst.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from __future__ import unicode_literals
diff --git a/setup.py b/setup.py
index 22547fc5f..8f74c06c1 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from setuptools import setup, Command, find_packages
diff --git a/test/test_InfoExtractor.py b/test/test_InfoExtractor.py
index c4b7f689e..9b6672a1d 100644
--- a/test/test_InfoExtractor.py
+++ b/test/test_InfoExtractor.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from __future__ import unicode_literals
 
diff --git a/test/test_YoutubeDL.py b/test/test_YoutubeDL.py
index 1696ccd30..2b3ed8f7b 100644
--- a/test/test_YoutubeDL.py
+++ b/test/test_YoutubeDL.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from __future__ import unicode_literals
diff --git a/test/test_YoutubeDLCookieJar.py b/test/test_YoutubeDLCookieJar.py
index 0fadf812b..c514413a4 100644
--- a/test/test_YoutubeDLCookieJar.py
+++ b/test/test_YoutubeDLCookieJar.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from __future__ import unicode_literals
diff --git a/test/test_aes.py b/test/test_aes.py
index efbdd2e1a..4fd87ce22 100644
--- a/test/test_aes.py
+++ b/test/test_aes.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from __future__ import unicode_literals
 
diff --git a/test/test_age_restriction.py b/test/test_age_restriction.py
index 2eccd4718..af89f29ff 100644
--- a/test/test_age_restriction.py
+++ b/test/test_age_restriction.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 # Allow direct execution
diff --git a/test/test_all_urls.py b/test/test_all_urls.py
index 5f3c77d8e..68c1c68d3 100644
--- a/test/test_all_urls.py
+++ b/test/test_all_urls.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from __future__ import unicode_literals
 
diff --git a/test/test_cache.py b/test/test_cache.py
index d6de22194..8c4f85387 100644
--- a/test/test_cache.py
+++ b/test/test_cache.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from __future__ import unicode_literals
diff --git a/test/test_compat.py b/test/test_compat.py
index d903a5bfe..c9bc4d7fb 100644
--- a/test/test_compat.py
+++ b/test/test_compat.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from __future__ import unicode_literals
diff --git a/test/test_download.py b/test/test_download.py
index ed6f73c0c..23d733f44 100644
--- a/test/test_download.py
+++ b/test/test_download.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from __future__ import unicode_literals
 
diff --git a/test/test_downloader_http.py b/test/test_downloader_http.py
index 2ef96b922..03ae8c62a 100644
--- a/test/test_downloader_http.py
+++ b/test/test_downloader_http.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 from __future__ import unicode_literals
 
diff --git a/test/test_execution.py b/test/test_execution.py
index 8a0d65bfb..cf6b6b913 100644
--- a/test/test_execution.py
+++ b/test/test_execution.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from __future__ import unicode_literals
diff --git a/test/test_http.py b/test/test_http.py
index c9e7ee225..40df167e0 100644
--- a/test/test_http.py
+++ b/test/test_http.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 from __future__ import unicode_literals
 
diff --git a/test/test_iqiyi_sdk_interpreter.py b/test/test_iqiyi_sdk_interpreter.py
index b39bf4270..e6ed9d628 100644
--- a/test/test_iqiyi_sdk_interpreter.py
+++ b/test/test_iqiyi_sdk_interpreter.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from __future__ import unicode_literals
 
diff --git a/test/test_jsinterp.py b/test/test_jsinterp.py
index def823884..8b2b60403 100644
--- a/test/test_jsinterp.py
+++ b/test/test_jsinterp.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from __future__ import unicode_literals
 
diff --git a/test/test_overwrites.py b/test/test_overwrites.py
index 41b4e6dea..20dfcb70a 100644
--- a/test/test_overwrites.py
+++ b/test/test_overwrites.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 import os
diff --git a/test/test_post_hooks.py b/test/test_post_hooks.py
index 51031871c..3f9a61c1e 100644
--- a/test/test_post_hooks.py
+++ b/test/test_post_hooks.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from __future__ import unicode_literals
 
diff --git a/test/test_postprocessors.py b/test/test_postprocessors.py
index 868bb25f9..1f8f375cc 100644
--- a/test/test_postprocessors.py
+++ b/test/test_postprocessors.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from __future__ import unicode_literals
 
diff --git a/test/test_socks.py b/test/test_socks.py
index 8b4286982..76aabb27f 100644
--- a/test/test_socks.py
+++ b/test/test_socks.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 from __future__ import unicode_literals
 
diff --git a/test/test_subtitles.py b/test/test_subtitles.py
index 61547cdb1..f7f356832 100644
--- a/test/test_subtitles.py
+++ b/test/test_subtitles.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 # Allow direct execution
diff --git a/test/test_swfinterp.py b/test/test_swfinterp.py
index 29a390e42..5d5b21e6d 100644
--- a/test/test_swfinterp.py
+++ b/test/test_swfinterp.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 # Allow direct execution
diff --git a/test/test_update.py.disabled b/test/test_update.py.disabled
index 617aee2f8..1e8edf0f6 100644
--- a/test/test_update.py.disabled
+++ b/test/test_update.py.disabled
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from __future__ import unicode_literals
 
diff --git a/test/test_utils.py b/test/test_utils.py
index cf541de4a..04d355b4f 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from __future__ import unicode_literals
diff --git a/test/test_verbose_output.py b/test/test_verbose_output.py
index 9b1ccde88..86b039a4a 100644
--- a/test/test_verbose_output.py
+++ b/test/test_verbose_output.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from __future__ import unicode_literals
diff --git a/test/test_write_annotations.py b/test/test_write_annotations.py
index 3a0122374..fa31be0cc 100644
--- a/test/test_write_annotations.py
+++ b/test/test_write_annotations.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 from __future__ import unicode_literals
 
diff --git a/test/test_youtube_lists.py b/test/test_youtube_lists.py
index b38a47fc5..528b75334 100644
--- a/test/test_youtube_lists.py
+++ b/test/test_youtube_lists.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 # Allow direct execution
diff --git a/test/test_youtube_misc.py b/test/test_youtube_misc.py
index d9bb10d26..402681cad 100644
--- a/test/test_youtube_misc.py
+++ b/test/test_youtube_misc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 # Allow direct execution
diff --git a/test/test_youtube_signature.py b/test/test_youtube_signature.py
index 80cb4b93a..1a5063bab 100644
--- a/test/test_youtube_signature.py
+++ b/test/test_youtube_signature.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from __future__ import unicode_literals
 
diff --git a/yt_dlp/YoutubeDL.py b/yt_dlp/YoutubeDL.py
index b67da9f08..a09c05b41 100644
--- a/yt_dlp/YoutubeDL.py
+++ b/yt_dlp/YoutubeDL.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from __future__ import absolute_import, unicode_literals
diff --git a/yt_dlp/__init__.py b/yt_dlp/__init__.py
index 108a44d47..45a29d3c7 100644
--- a/yt_dlp/__init__.py
+++ b/yt_dlp/__init__.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from __future__ import unicode_literals
diff --git a/yt_dlp/__main__.py b/yt_dlp/__main__.py
index f7329d67e..c9f41473d 100644
--- a/yt_dlp/__main__.py
+++ b/yt_dlp/__main__.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import unicode_literals
 
 # Execute with
diff --git a/yt_dlp/utils.py b/yt_dlp/utils.py
index ee4343515..dea7d85cd 100644
--- a/yt_dlp/utils.py
+++ b/yt_dlp/utils.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # coding: utf-8
 
 from __future__ import unicode_literals