diff --git a/Ex-Machina/ex-machina.py b/Ex-Machina/ex-machina.py
index 2ec2b7011..913c6dc28 100644
--- a/Ex-Machina/ex-machina.py
+++ b/Ex-Machina/ex-machina.py
@@ -3,7 +3,7 @@
 def sieve(n):
     x = [1] * n
     x[1] = 0
-    for i in range(2,n/2):
+    for i in range(2,n//2):
             j = 2 * i
             while j < n:
                     x[j]=0
@@ -26,4 +26,4 @@ def prime(n,x):
 for i in range (0,4):
     sys.stdout.write(str(prime(code[i],x)-key[i]))
 
-print
\ No newline at end of file
+print