diff -Nru circlator-1.5.5/debian/changelog circlator-1.5.5/debian/changelog
--- circlator-1.5.5/debian/changelog	2018-12-03 09:37:35.000000000 +0000
+++ circlator-1.5.5/debian/changelog	2019-02-04 08:32:42.000000000 +0000
@@ -1,3 +1,13 @@
+circlator (1.5.5-3) unstable; urgency=medium
+
+  * Team upload.
+  * Architecture amd64 only
+    Closes: #921216
+  * debhelper 12
+  * Standards-Version: 4.3.0
+
+ -- Andreas Tille <tille@debian.org>  Mon, 04 Feb 2019 09:32:42 +0100
+
 circlator (1.5.5-2) unstable; urgency=medium
 
   * Team upload.
diff -Nru circlator-1.5.5/debian/compat circlator-1.5.5/debian/compat
--- circlator-1.5.5/debian/compat	2018-12-03 09:37:35.000000000 +0000
+++ circlator-1.5.5/debian/compat	2019-02-04 08:32:42.000000000 +0000
@@ -1 +1 @@
-11
+12
diff -Nru circlator-1.5.5/debian/control circlator-1.5.5/debian/control
--- circlator-1.5.5/debian/control	2018-12-03 09:37:35.000000000 +0000
+++ circlator-1.5.5/debian/control	2019-02-04 08:32:42.000000000 +0000
@@ -3,7 +3,7 @@
 Uploaders: Afif Elghraoui <afif@debian.org>
 Section: science
 Priority: optional
-Build-Depends: debhelper (>= 11~),
+Build-Depends: debhelper (>= 12~),
                dh-python,
                python3-all,
                python3-setuptools,
@@ -18,13 +18,13 @@
                bwa (>= 0.7.12),
                prodigal,
                canu (<< 1.8+dfsg-1) | canu (>= 1.8+dfsg-2)
-Standards-Version: 4.2.1
+Standards-Version: 4.3.0
 Vcs-Browser: https://salsa.debian.org/med-team/circlator
 Vcs-Git: https://salsa.debian.org/med-team/circlator.git
 Homepage: http://sanger-pathogens.github.io/circlator/
 
 Package: circlator
-Architecture: all
+Architecture: amd64
 Depends: ${misc:Depends},
          ${python3:Depends},
          prodigal,
diff -Nru circlator-1.5.5/debian/patches/fix_canu_detection.patch circlator-1.5.5/debian/patches/fix_canu_detection.patch
--- circlator-1.5.5/debian/patches/fix_canu_detection.patch	2018-12-03 09:37:35.000000000 +0000
+++ circlator-1.5.5/debian/patches/fix_canu_detection.patch	2019-02-04 08:32:42.000000000 +0000
@@ -1,5 +1,5 @@
 Description: Fix canu detection
-Autor: Andreas Tille <tille@debian.org>
+Author: Andreas Tille <tille@debian.org>
 Last-Update: Sat, 02 Dec 2017 16:44:51 +0100
 Bug-Debian: https://bugs.debian.org/880248