diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d60a428bf..37a306abd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -82,9 +82,14 @@ jobs:
       if: success() || failure()
       run: |
         rm -rf "$DF_FOLDER"
+
   lint:
     runs-on: ubuntu-18.04
     steps:
+    - name: Set up Python 3
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3
     - name: Install dependencies
       run: |
         sudo apt-get update
diff --git a/travis/all.py b/travis/all.py
old mode 100644
new mode 100755
index 281911e7a..edd2eee18
--- a/travis/all.py
+++ b/travis/all.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import argparse, os, sys, time
 
 parser = argparse.ArgumentParser()
diff --git a/travis/authors-rst.py b/travis/authors-rst.py
old mode 100644
new mode 100755
index 2d7274219..e8db817f6
--- a/travis/authors-rst.py
+++ b/travis/authors-rst.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """ Overly-complicated script to check formatting/sorting in Authors.rst """
 
 import re, sys
diff --git a/travis/check-rpc.py b/travis/check-rpc.py
old mode 100644
new mode 100755
index ecddafa9f..aba3e3811
--- a/travis/check-rpc.py
+++ b/travis/check-rpc.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import glob
 import sys
 
diff --git a/travis/lint.py b/travis/lint.py
old mode 100644
new mode 100755
index 53abc4cbc..51117201c
--- a/travis/lint.py
+++ b/travis/lint.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import re, os, sys
 
 valid_extensions = ['c', 'cpp', 'h', 'hpp', 'mm', 'lua', 'rb', 'proto',
diff --git a/travis/run-tests.py b/travis/run-tests.py
old mode 100644
new mode 100755
index 70ab6cf20..f4c173af2
--- a/travis/run-tests.py
+++ b/travis/run-tests.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import argparse
 import enum
 import json
diff --git a/travis/script-docs.py b/travis/script-docs.py
old mode 100644
new mode 100755
index 33b2818c8..04728e101
--- a/travis/script-docs.py
+++ b/travis/script-docs.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 from __future__ import print_function
 from io import open
 import os
diff --git a/travis/script-syntax.py b/travis/script-syntax.py
old mode 100644
new mode 100755
index e33a11f1d..1f6eca2eb
--- a/travis/script-syntax.py
+++ b/travis/script-syntax.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 import argparse
 import os
 import subprocess