diff --git a/website/docs/usage/lightning-tour.jade b/website/docs/usage/lightning-tour.jade
index 2fd390d26..6c98cf3f3 100644
--- a/website/docs/usage/lightning-tour.jade
+++ b/website/docs/usage/lightning-tour.jade
@@ -58,13 +58,13 @@ p
     assert token.shape_ == 'Xxxxx'
     for lexeme in nlp.vocab:
         if lexeme.is_alpha:
-            lexeme.shape_ = 'W'
+            lexeme.shape_ = u'W'
         elif lexeme.is_digit:
-            lexeme.shape_ = 'D'
+            lexeme.shape_ = u'D'
         elif lexeme.is_punct:
-            lexeme.shape_ = 'P'
+            lexeme.shape_ = u'P'
         else:
-            lexeme.shape_ = 'M'
+            lexeme.shape_ = u'M'
     assert token.shape_ == 'W'
 
 +h(2, "examples-numpy-arrays") Export to numpy arrays