diff --git a/README.md b/README.md
index 7986e98..fb48442 100644
--- a/README.md
+++ b/README.md
@@ -44,8 +44,8 @@ Manage Debian's sources.list :
 ### Preferences
 
 * Set the preferences for all repositories, default to :
-  - Stretch - 310.
-  - Stretch Backports - 300.
+  - Stretch - 510.
+  - Stretch Backports - 500.
 
 ## Development
 
diff --git a/templates/etc/apt/preferences.d/default.pref.j2 b/templates/etc/apt/preferences.d/default.pref.j2
index f12a449..95989ed 100644
--- a/templates/etc/apt/preferences.d/default.pref.j2
+++ b/templates/etc/apt/preferences.d/default.pref.j2
@@ -4,10 +4,10 @@
 Explanation: Packages from Stretch (Stable)
 Package: *
 Pin: release o=Debian,a=stable,n=stretch,l=Debian
-Pin-Priority: 310
+Pin-Priority: 510
 
 Explanation: Packages from Stretch (Stable)
 Package: *
 Pin: release o=Debian Backports,a=stretch-backports,n=stretch-backports,l=Debian Backports
-Pin-Priority: 300
+Pin-Priority: 500
 {% endif %}