diff --git a/Makefile b/Makefile
index e8d53b5a4..ec75d98eb 100644
--- a/Makefile
+++ b/Makefile
@@ -207,7 +207,7 @@ endif
 # Run make without -j if this happens.
 
 %.ttx: %.ttx.tmpl $(ADD_GLYPHS) $(ALL_COMPRESSED_FILES)
-	@python $(ADD_GLYPHS) -f "$<" -o "$@" -d "$(COMPRESSED_DIR)" $(ADD_GLYPHS_FLAGS)
+	@python3 $(ADD_GLYPHS) -f "$<" -o "$@" -d "$(COMPRESSED_DIR)" $(ADD_GLYPHS_FLAGS)
 
 %.ttf: %.ttx
 	@rm -f "$@"
@@ -215,8 +215,8 @@ endif
 
 $(EMOJI).ttf: $(EMOJI).tmpl.ttf $(EMOJI_BUILDER) $(PUA_ADDER) \
 	$(ALL_COMPRESSED_FILES) | check_vs_adder
-	@python $(EMOJI_BUILDER) $(SMALL_METRICS) -V $< "$@" "$(COMPRESSED_DIR)/emoji_u"
-	@python $(PUA_ADDER) "$@" "$@-with-pua"
+	@python3 $(EMOJI_BUILDER) $(SMALL_METRICS) -V $< "$@" "$(COMPRESSED_DIR)/emoji_u"
+	@python3 $(PUA_ADDER) "$@" "$@-with-pua"
 	@$(VS_ADDER) -vs 2640 2642 2695 --dstdir '.' -o "$@-with-pua-varsel" "$@-with-pua"
 	@mv "$@-with-pua-varsel" "$@"
 	@rm "$@-with-pua"
diff --git a/add_aliases.py b/add_aliases.py
index 90aed7d98..b943f5db0 100755
--- a/add_aliases.py
+++ b/add_aliases.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright 2017 Google Inc. All rights reserved.
 #
diff --git a/add_emoji_gsub.py b/add_emoji_gsub.py
index bae73cbb4..9f578a302 100755
--- a/add_emoji_gsub.py
+++ b/add_emoji_gsub.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright 2014 Google Inc. All rights reserved.
 #
diff --git a/add_glyphs.py b/add_glyphs.py
index 36d40e676..4d4430f4b 100644
--- a/add_glyphs.py
+++ b/add_glyphs.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """Extend a ttx file with additional data.
 
diff --git a/add_svg_glyphs.py b/add_svg_glyphs.py
index 0f7a6b3bf..630915787 100755
--- a/add_svg_glyphs.py
+++ b/add_svg_glyphs.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright 2015 Google, Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/check_emoji_sequences.py b/check_emoji_sequences.py
index f29bbe90b..dff1b8657 100755
--- a/check_emoji_sequences.py
+++ b/check_emoji_sequences.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright 2016 Google Inc. All rights reserved.
 #
diff --git a/collect_emoji_svg.py b/collect_emoji_svg.py
index ea39cbde0..9d2ba640e 100755
--- a/collect_emoji_svg.py
+++ b/collect_emoji_svg.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright 2015 Google, Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/flag_glyph_name.py b/flag_glyph_name.py
index 50c266b8c..e5ce40c20 100755
--- a/flag_glyph_name.py
+++ b/flag_glyph_name.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright 2014 Google Inc. All rights reserved.
 #
diff --git a/flag_info.py b/flag_info.py
index 233243f7d..3dbd63f24 100755
--- a/flag_info.py
+++ b/flag_info.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 #
 # Copyright 2016 Google Inc. All rights reserved.
 #
diff --git a/gen_version.py b/gen_version.py
index 749f12edd..48581a82d 100755
--- a/gen_version.py
+++ b/gen_version.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright 2015 Google Inc. All rights reserved.
 #
diff --git a/generate_emoji_html.py b/generate_emoji_html.py
index 8e0d56ca7..09fa8ed03 100755
--- a/generate_emoji_html.py
+++ b/generate_emoji_html.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright 2016 Google Inc. All rights reserved.
 #
diff --git a/generate_emoji_name_data.py b/generate_emoji_name_data.py
index b22805803..9a7262161 100755
--- a/generate_emoji_name_data.py
+++ b/generate_emoji_name_data.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-#
 #
 # Copyright 2015 Google Inc. All rights reserved.
diff --git a/generate_emoji_thumbnails.py b/generate_emoji_thumbnails.py
index e67da5339..5f70351e4 100755
--- a/generate_emoji_thumbnails.py
+++ b/generate_emoji_thumbnails.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright 2017 Google Inc. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/generate_test_html.py b/generate_test_html.py
index 21ab1c640..e45108cbd 100755
--- a/generate_test_html.py
+++ b/generate_test_html.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright 2015 Google, Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/map_pua_emoji.py b/map_pua_emoji.py
index ff8d6a9b0..912ddac50 100644
--- a/map_pua_emoji.py
+++ b/map_pua_emoji.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright 2014 Google Inc. All rights reserved.
 #
diff --git a/materialize_emoji_images.py b/materialize_emoji_images.py
index d8a8b0e86..83e3fdd21 100755
--- a/materialize_emoji_images.py
+++ b/materialize_emoji_images.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright 2016 Google Inc. All rights reserved.
 #
diff --git a/strip_vs_from_filenames.py b/strip_vs_from_filenames.py
index f27cb3c2f..f0f7422fd 100755
--- a/strip_vs_from_filenames.py
+++ b/strip_vs_from_filenames.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright 2017 Google Inc. All rights reserved.
 #
diff --git a/svg_cleaner.py b/svg_cleaner.py
index e968d2fc8..40d3827e9 100755
--- a/svg_cleaner.py
+++ b/svg_cleaner.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright 2015 Google, Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");