--- a/hgext/hgmo/__init__.py
+++ b/hgext/hgmo/__init__.py
@@ -109,18 +109,18 @@ from mercurial.hgweb.protocol import (
 
 OUR_DIR = os.path.dirname(__file__)
 ROOT = os.path.normpath(os.path.join(OUR_DIR, '..', '..'))
 execfile(os.path.join(OUR_DIR, '..', 'bootstrap.py'))
 
 import mozautomation.commitparser as commitparser
 
 
-minimumhgversion = '4.0'
-testedwith = '4.0'
+minimumhgversion = '4.1'
+testedwith = '4.1'
 
 cmdtable = {}
 command = cmdutil.command(cmdtable)
 
 
 @templatefilters.templatefilter('mozlink')
 def mozlink(text):
     """Any text. Hyperlink to Bugzilla and other detected things."""

--- a/hgext/obsolescencehacks/__init__.py
+++ b/hgext/obsolescencehacks/__init__.py
@@ -6,18 +6,18 @@
 import os
 import pwd
 
 from mercurial import (
     error,
     obsolete,
 )
 
-testedwith = '4.0'
-minimumhgversion = '4.0'
+testedwith = '4.1'
+minimumhgversion = '4.1'
 
 
 def enableevolutionexchange(repo):
     """Enable obsolescence markers exchange if conditions are met."""
     ui = repo.ui
 
     # Nothing to do if obsolescence isn't enabled at all.
     opts = (obsolete.createmarkersopt, obsolete.allowunstableopt, obsolete.exchangeopt)

--- a/hgext/reviewboard/server.py
+++ b/hgext/reviewboard/server.py
@@ -51,18 +51,18 @@ execfile(os.path.join(OUR_DIR, '..', 'bo
 
 with demandimport.deactivated():
     try:
         import hgrb.proto
     except ImportError:
         sys.path.insert(0, OUR_DIR)
         import hgrb.proto
 
-testedwith = '4.0'
-minimumhgversion = '4.0'
+testedwith = '4.1'
+minimumhgversion = '4.1'
 
 cmdtable = {}
 command = cmdutil.command(cmdtable)
 
 
 # Capabilities the server requires in clients.
 #
 # Add to this and add a corresponding entry in the client extension to force

--- a/hgext/serverlog/__init__.py
+++ b/hgext/serverlog/__init__.py
@@ -179,18 +179,18 @@ from mercurial import (
     wireproto,
 )
 from mercurial.hgweb import (
     protocol,
     hgweb_mod,
     hgwebdir_mod,
 )
 
-testedwith = '4.0'
-minimumhgversion = '4.0'
+testedwith = '4.1'
+minimumhgversion = '4.1'
 
 origcall = protocol.call
 
 def protocolcall(repo, req, cmd):
     """Wraps mercurial.hgweb.protocol to record requests."""
 
     # TODO figure out why our custom attribute is getting lost in
     # production.

--- a/pylib/vcsreplicator/vcsreplicator/hgext.py
+++ b/pylib/vcsreplicator/vcsreplicator/hgext.py
@@ -28,17 +28,17 @@ from mercurial import (
     error,
     extensions,
     hg,
     obsolete,
     util,
     wireproto,
 )
 
-testedwith = '4.0'
+testedwith = '4.1'
 
 cmdtable = {}
 command = cmdutil.command(cmdtable)
 
 
 def precommithook(ui, repo, **kwargs):
     # We could probably handle local commits. But our target audience is
     # server environments, where local commits shouldn't be happening.