diff --git a/source/c02/p16_reformat_text_to_fixed_number_columns.rst b/source/c02/p16_reformat_text_to_fixed_number_columns.rst
index 760d8d01..f92b9246 100644
--- a/source/c02/p16_reformat_text_to_fixed_number_columns.rst
+++ b/source/c02/p16_reformat_text_to_fixed_number_columns.rst
@@ -64,5 +64,5 @@
 参阅 `textwrap.TextWrapper文档`_ 获取更多内容。
 
 .. _textwrap.TextWrapper文档:
-    https://docs.python.org/3.3/library/textwrap.html#textwrap.TextWrapper
+    https://docs.python.org/3.6/library/textwrap.html#textwrap.TextWrapper