diff --git a/texmf-dist/scripts/de-macro/de-macro b/texmf-dist/scripts/de-macro/de-macro
index 30dfc75..4a600c0 100755
--- a/texmf-dist/scripts/de-macro/de-macro
+++ b/texmf-dist/scripts/de-macro/de-macro
@@ -1,4 +1,4 @@
-#!/usr/bin/python -O
+#!/usr/bin/python3
 
 r"""
 Copyright 2005-2020 Peter Gacs
diff --git a/texmf-dist/scripts/ebong/ebong.py b/texmf-dist/scripts/ebong/ebong.py
index 3450b36..692ab86 100755
--- a/texmf-dist/scripts/ebong/ebong.py
+++ b/texmf-dist/scripts/ebong/ebong.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # look in newbong
 import re
 A='A'
diff --git a/texmf-dist/scripts/lilyglyphs/lily-glyph-commands.py b/texmf-dist/scripts/lilyglyphs/lily-glyph-commands.py
index dae48cd..fd09d3f 100755
--- a/texmf-dist/scripts/lilyglyphs/lily-glyph-commands.py
+++ b/texmf-dist/scripts/lilyglyphs/lily-glyph-commands.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 # %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 #                                                                        %
diff --git a/texmf-dist/scripts/lilyglyphs/lily-image-commands.py b/texmf-dist/scripts/lilyglyphs/lily-image-commands.py
index 741ad40..5b5368e 100755
--- a/texmf-dist/scripts/lilyglyphs/lily-image-commands.py
+++ b/texmf-dist/scripts/lilyglyphs/lily-image-commands.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 # %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 #                                                                        %
diff --git a/texmf-dist/scripts/lilyglyphs/lily-rebuild-pdfs.py b/texmf-dist/scripts/lilyglyphs/lily-rebuild-pdfs.py
index 03a94d8..ff51af7 100755
--- a/texmf-dist/scripts/lilyglyphs/lily-rebuild-pdfs.py
+++ b/texmf-dist/scripts/lilyglyphs/lily-rebuild-pdfs.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 # %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 #                                                                        %
diff --git a/texmf-dist/scripts/memoize/memoize-clean.py b/texmf-dist/scripts/memoize/memoize-clean.py
index 69beeb0..1516963 100755
--- a/texmf-dist/scripts/memoize/memoize-clean.py
+++ b/texmf-dist/scripts/memoize/memoize-clean.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 # This file is a part of Memoize, a TeX package for externalization of
 # graphics and memoization of compilation results in general, available at
diff --git a/texmf-dist/scripts/pythontex/depythontex.py b/texmf-dist/scripts/pythontex/depythontex.py
index f015c15..8fb5b75 100755
--- a/texmf-dist/scripts/pythontex/depythontex.py
+++ b/texmf-dist/scripts/pythontex/depythontex.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # -*- coding: utf-8 -*-
 
 '''
@@ -17,7 +17,4 @@ Licensed under the BSD 3-Clause License:
 '''
 
 import sys
-if sys.version_info[0] == 2:
-    import depythontex2 as depythontex
-elif sys.version_info[0] == 3:
-    import depythontex3 as depythontex
+import depythontex3 as depythontex
diff --git a/texmf-dist/scripts/pythontex/pythontex.py b/texmf-dist/scripts/pythontex/pythontex.py
index 21c2966..38b5542 100755
--- a/texmf-dist/scripts/pythontex/pythontex.py
+++ b/texmf-dist/scripts/pythontex/pythontex.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # -*- coding: utf-8 -*-
 
 '''
@@ -45,16 +45,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
 import sys
-if sys.version_info.major == 2:
-    if sys.version_info.minor >= 7:
-        import pythontex2 as pythontex
-    else:
-        sys.exit('PythonTeX require Python 2.7; you are using 2.{0}'.format(sys.version_info.minor))
-elif sys.version_info.major == 3:
-    if sys.version_info.minor >= 2:
-        import pythontex3 as pythontex
-    else:
-        sys.exit('PythonTeX require Python 3.2+; you are using 3.{0}'.format(sys.version_info.minor))
+import pythontex3 as pythontex
 
 # The "if" statement is needed for multiprocessing under Windows; see the
 # multiprocessing documentation.
diff --git a/texmf-dist/scripts/texliveonfly/texliveonfly.py b/texmf-dist/scripts/texliveonfly/texliveonfly.py
index fa809ff..94ef19d 100755
--- a/texmf-dist/scripts/texliveonfly/texliveonfly.py
+++ b/texmf-dist/scripts/texliveonfly/texliveonfly.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 # default options; feel free to change!
 defaultCompiler = "pdflatex"