diff --git a/libchronosync/debian/control b/libchronosync/debian/control
index 5ea3789..2799f0d 100644
--- a/libchronosync/debian/control
+++ b/libchronosync/debian/control
@@ -2,11 +2,11 @@
 Priority: extra
 Maintainer: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
 Build-Depends: debhelper (>= 8.0.0),
- python3 (>= 3.5.0),
+ python3 (>= 3.6.0),
  pkg-config (>= 0.26),
- python3-sphinx (>= 1.1.3),
  libboost-all-dev (>= 1.53.0),
  libndn-cxx-dev (>= 0.7.0),
+ python3-sphinx (>= 1.6.0),
  git
 Standards-Version: 3.9.2
 Section: libs