diff --git a/debian/changelog b/debian/changelog
index 71b94f8..db8e632 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -3,6 +3,7 @@
   * Change team mail address. (Closes: #899453)
   * Bump Standards-Version to 4.1.4.
   * Add Vcs-Git and Vcs-Browser.
+  * Update debhelper to 11.
 
  -- Nobuhiro Iwamatsu <iwamatsu@debian.org>  Sat, 09 Jun 2018 07:02:39 +0900
 
diff --git a/debian/compat b/debian/compat
index 7ed6ff8..b4de394 100644
--- a/debian/compat
+++ b/debian/compat
@@ -1 +1 @@
-5
+11
diff --git a/debian/control b/debian/control
index 2af4ad8..1648c37 100644
--- a/debian/control
+++ b/debian/control
@@ -3,7 +3,7 @@
 Priority: optional
 Maintainer: Debian Bluetooth Maintainers <team+pkg-bluetooth@tracker.debian.org>
 Uploaders: Filippo Giunchedi <filippo@debian.org>, Nobuhiro Iwamatsu <iwamatsu@debian.org>
-Build-Depends: debhelper (>= 5), autotools-dev, cdbs
+Build-Depends: debhelper (>= 11), autotools-dev, cdbs
 Standards-Version: 4.1.4
 Vcs-Git: https://salsa.debian.org/bluetooth-team/bluez-firmware.git
 Vcs-Browser: https://salsa.debian.org/bluetooth-team/bluez-firmware