diff --git a/atom_gen.py b/atom_gen.py
index e9e0828..091a2d1 100755
--- a/atom_gen.py
+++ b/atom_gen.py
@@ -1,4 +1,4 @@
-#! /usr/bin/python3
+#! /usr/bin/env python3
 
 # needs lowdown and feegden installed
 # feedgen can be installed with pip
diff --git a/blog.py b/blog.py
old mode 100644
new mode 100755
index e059b3a..4bfb304
--- a/blog.py
+++ b/blog.py
@@ -1,3 +1,4 @@
+#! /usr/bin/env python3
 # just testing markdown library for now
 
 from markdown import markdown as to_markdown
diff --git a/build_pages.py b/build_pages.py
old mode 100644
new mode 100755
index fe493a1..1c49640
--- a/build_pages.py
+++ b/build_pages.py
@@ -1,3 +1,4 @@
+#! /usr/bin/env python3
 import os
 
 PAGES = [
@@ -38,4 +39,4 @@ def main():
                 f.close()
 
 if __name__ == '__main__':
-    main()
\ No newline at end of file
+    main()
diff --git a/image_poster.py b/image_poster.py
old mode 100644
new mode 100755
index 551e829..83dc547
--- a/image_poster.py
+++ b/image_poster.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 import freetype
 import io
@@ -86,4 +86,4 @@ img = drawPoster(events, (0, 0, 0), (20, 250, 50))
 img.save('poster_dark.png')
 
 img = drawPoster(events, (255, 255, 255), (0, 0, 0))
-img.save('poster_light.png')
\ No newline at end of file
+img.save('poster_light.png')
diff --git a/poster.py b/poster.py
old mode 100644
new mode 100755
index 5572b11..a6a29ae
--- a/poster.py
+++ b/poster.py
@@ -1,3 +1,4 @@
+#! /usr/bin/env python3
 import csv
 import datetime as dt
 from dateutil import relativedelta
diff --git a/prep.py b/prep.py
old mode 100644
new mode 100755
index c3fb0d8..592e072
--- a/prep.py
+++ b/prep.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 import csv
 from datetime import datetime