diff --git a/vigil b/vigil
index 77b55a0..72fbf2f 100755
--- a/vigil
+++ b/vigil
@@ -1,5 +1,8 @@
 #!/usr/bin/env python
 
+from __future__ import print_function
+from builtins import filter
+from builtins import range
 import re
 import sys
 import traceback
@@ -33,7 +36,7 @@ def punish(line, offense):
 
     # Clear the lines, but don't delete them. That way later failures will
     # have the right line number.
-    for i in xrange(start, end + 1):
+    for i in range(start, end):
         source_lines[i] = ''
 
 def vigil_implore(ok, expr):
@@ -53,27 +56,27 @@ def vigil_done():
         return
 
     # Strip out the dirty impure lines.
-    cleansed = filter(len, source_lines)
+    cleansed = list(filter(len, source_lines))
     with open(source_path, 'w') as f:
         f.writelines(cleansed)
 
-    print ""
-    print ""
-    print "------------------------------------------------------------------"
-    print ""
-    print "The ever vigilant watchers of your code have found malfeasance in:"
-    print ""
+    print("")
+    print("")
+    print("------------------------------------------------------------------")
+    print("")
+    print("The ever vigilant watchers of your code have found malfeasance in:")
+    print("")
 
     for fn, offense, _ in offenders:
-        print fn
-        print "Crime:", offense
-        print ""
+        print(fn)
+        print("Crime:", offense)
+        print("")
 
-    print "Each has been dealt an appropriate punishment."
+    print("Each has been dealt an appropriate punishment.")
 
 def vigil_uncaught():
     raise_line = traceback.extract_tb(sys.exc_info()[2])[-1][1]
-    print "uncaught error from line ", raise_line
+    print("uncaught error from line ", raise_line)
     punish(raise_line, "Raised '%s' which was not caught." % sys.exc_info()[1])
 
 try: