diff --git a/devscripts/bash-completion.py b/devscripts/bash-completion.py
index a41aa4c620..46b4b2ff55 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 5e00724683..50f6bebc64 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 e5740f40e8..53b3e0f485 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 5313c4a016..fb45e02805 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 f9bb2ad3b0..0979eee5b9 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 61487f9258..e122d0283f 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 c4e5fc1f40..d06655d106 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 b0cacbc4bf..c7f3eef761 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 13f337c822..9020592317 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 cc1cf0bd4a..f13262f76f 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 9cbf5b7498..3f56af7447 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 12655bf89b..17a34843fd 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 4578a33ceb..485b39e9f3 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 e76f1e4c8a..4855aa7c85 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 c6e7b53098..2d1673d0e2 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 68d40014ba..780df0de6c 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 b0b68e6c3d..8f24fdaf67 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 22547fc5f3..8f74c06c1a 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 c4b7f689e3..9b6672a1db 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 1696ccd306..2b3ed8f7b5 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 0fadf812b0..c514413a45 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 efbdd2e1a9..4fd87ce229 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 2eccd47187..af89f29ff7 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 5f3c77d8e0..68c1c68d3f 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 d6de221946..8c4f853872 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 d903a5bfea..c9bc4d7fb5 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 ed6f73c0c9..23d733f446 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 2ef96b922c..03ae8c62a4 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 8a0d65bfb1..cf6b6b9135 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 c9e7ee225c..40df167e07 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 b39bf42701..e6ed9d628c 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 def823884d..8b2b60403c 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 41b4e6dead..20dfcb70a1 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 51031871c6..3f9a61c1ec 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 868bb25f9b..1f8f375cc3 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 8b42869821..76aabb27f0 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 61547cdb10..f7f356832e 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 29a390e425..5d5b21e6d2 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 617aee2f8b..1e8edf0f6b 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 cf541de4ad..04d355b4fb 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 9b1ccde880..86b039a4aa 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 3a01223748..fa31be0cc6 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 b38a47fc51..528b753345 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 d9bb10d265..402681cad8 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 80cb4b93aa..1a5063bab8 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 b67da9f08d..a09c05b414 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 108a44d473..45a29d3c76 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 f7329d67ea..c9f41473db 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 ee43435156..dea7d85cd4 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