diff --git a/misc/download-mypyc-wheels.py b/misc/download-mypyc-wheels.py
index 71114d1776bd0..ca18effe7cfd1 100755
--- a/misc/download-mypyc-wheels.py
+++ b/misc/download-mypyc-wheels.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-
 # Script for downloading mypyc-compiled mypy wheels in preparation for a release
 
 import os
diff --git a/misc/dump-ast.py b/misc/dump-ast.py
index c3d8858af9c65..8ded2389e77db 100755
--- a/misc/dump-ast.py
+++ b/misc/dump-ast.py
@@ -1,5 +1,4 @@
-#!/usr/bin/env python
-
+#!/usr/bin/env python3
 """
 Parse source files and print the abstract syntax trees.
 """
diff --git a/mypy/stubgen.py b/mypy/stubgen.py
index c32d1719e9e44..a901b4d153f9a 100755
--- a/mypy/stubgen.py
+++ b/mypy/stubgen.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """Generator of dynamically typed draft stubs for arbitrary modules.
 
 The logic of this script can be split in three steps:
diff --git a/mypy/stubgenc.py b/mypy/stubgenc.py
old mode 100644
new mode 100755
index 628a24d9cff3f..cbe1575379dd4
--- a/mypy/stubgenc.py
+++ b/mypy/stubgenc.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """Stub generator for C modules.
 
 The public interface is via the mypy.stubgen module.