fix versionchanged
diff --git a/Doc/library/warnings.rst b/Doc/library/warnings.rst
index ede991d..25e5db3 100644
--- a/Doc/library/warnings.rst
+++ b/Doc/library/warnings.rst
@@ -91,7 +91,7 @@
 standard warning categories.  A warning category must always be a subclass of
 the :exc:`Warning` class.
 
-.. versionchanged:: 2.7
+.. versionchanged:: 3.2
    :exc:`DeprecationWarning` is ignored by default.