diff --git a/Demo/scripts/fact.py b/Demo/scripts/fact.py
index 4833e08..bf49afc 100755
--- a/Demo/scripts/fact.py
+++ b/Demo/scripts/fact.py
@@ -1,4 +1,4 @@
-#! /usr/local/python
+#! /usr/local/bin/python
 
 # Factorize numbers.
 # The algorithm is not efficient, but easy to understand.
diff --git a/Demo/scripts/makedir.py b/Demo/scripts/makedir.py
index b08e455..563c83f 100755
--- a/Demo/scripts/makedir.py
+++ b/Demo/scripts/makedir.py
@@ -1,4 +1,4 @@
-#! /usr/local/python
+#! /usr/local/bin/python
 
 # Like mkdir, but also make intermediate directories if necessary.
 # It is not an error if the given directory already exists (as long
diff --git a/Demo/scripts/pi.py b/Demo/scripts/pi.py
index 832aedc..200cb4a 100755
--- a/Demo/scripts/pi.py
+++ b/Demo/scripts/pi.py
@@ -1,4 +1,4 @@
-#! /usr/local/python
+#! /usr/local/bin/python
 
 # Print digits of pi forever.
 #
diff --git a/Demo/scripts/primes.py b/Demo/scripts/primes.py
index 6a36d6e..3e6a646 100755
--- a/Demo/scripts/primes.py
+++ b/Demo/scripts/primes.py
@@ -1,4 +1,4 @@
-#! /usr/local/python
+#! /usr/local/bin/python
 
 # Print prime numbers in a given range