Update r2wiki.py

Author: securisec

r2wiki.py

@@ -93,6 +93,6 @@ def arg_parse():
 except IndexError:
     print 'Usage: %s search_param' % sys.argv[0]
 except NameError:
-    print 'pip install Pygments'
+    print 'pip install -U Pygments'
 except ImportError:
-    print 'Pygments dependency not met. pip install Pygments'
+    print 'Pygments dependency not met. pip install -U Pygments'