diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 6ab0ff6..d677171 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -354,7 +354,7 @@
    The numeric literals accepted include the digits ``0`` to ``9`` or any
    Unicode equivalent (code points with the ``Nd`` property).
 
-   See http://www.unicode.org/Public/6.0.0/ucd/extracted/DerivedNumericType.txt
+   See http://www.unicode.org/Public/6.3.0/ucd/extracted/DerivedNumericType.txt
    for a complete list of code points with the ``Nd`` property.
 
 
diff --git a/Tools/unicode/makeunicodedata.py b/Tools/unicode/makeunicodedata.py
index 0942508..0aebdca 100644
--- a/Tools/unicode/makeunicodedata.py
+++ b/Tools/unicode/makeunicodedata.py
@@ -37,6 +37,10 @@
 VERSION = "3.2"
 
 # The Unicode Database
+# --------------------
+# When changing UCD version please update
+#   * Doc/library/stdtypes.rst, and
+#   * Doc/library/unicodedata.rst
 UNIDATA_VERSION = "6.3.0"
 UNICODE_DATA = "UnicodeData%s.txt"
 COMPOSITION_EXCLUSIONS = "CompositionExclusions%s.txt"