More versionadded/versionchanged fixes
diff --git a/Doc/library/http.client.rst b/Doc/library/http.client.rst
index 02ab9dc..31a0a9a 100644
--- a/Doc/library/http.client.rst
+++ b/Doc/library/http.client.rst
@@ -384,7 +384,7 @@
    Set the debugging level (the amount of debugging output printed). The default
    debug level is ``0``, meaning no debugging output is printed.
 
-   .. versionadded:: 2.7
+   .. versionadded:: 3.1
 
 .. method:: HTTPConnection.set_tunnel(host, port=None)