diff -r f42a87cc864d -r 790feb47ec64 debian/control
--- a/debian/control	Wed Nov 01 23:51:55 2017 +0100
+++ b/debian/control	Thu Nov 02 00:32:24 2017 +0100
@@ -7,7 +7,7 @@
  Pierre-Yves David <pierre-yves.david@logilab.fr>,
 Standards-Version: 3.9.3
 Build-Depends:
- mercurial (>= 3.4~),
+ mercurial (>= 4.1),
  python,
  debhelper (>= 8),
  python-sphinx (>= 1.0.8),
@@ -22,7 +22,7 @@
 Depends:
  ${python:Depends},
  ${misc:Depends},
- mercurial (>= 3.3~),
+ mercurial (>= 4.1),
 Description: evolve extension for Mercurial
  This package provides the experimental "evolve" extension for the Mercurial
  DVCS.