diff -Nru libcloud-2.3.0/debian/changelog libcloud-2.3.0/debian/changelog
--- libcloud-2.3.0/debian/changelog	2018-04-07 21:22:41.000000000 +0000
+++ libcloud-2.3.0/debian/changelog	2018-08-27 12:52:47.000000000 +0000
@@ -1,3 +1,10 @@
+libcloud (2.3.0-1ubuntu1) cosmic; urgency=medium
+
+  * d/control: add <= 3.6 to X-Python3-Version because python 3.7 is not
+    yet supported by upstream (LP: #1788931)
+
+ -- Andreas Hasenack <andreas@canonical.com>  Mon, 27 Aug 2018 12:52:47 +0000
+
 libcloud (2.3.0-1) unstable; urgency=medium
 
   [ Ondřej Nový ]
diff -Nru libcloud-2.3.0/debian/control libcloud-2.3.0/debian/control
--- libcloud-2.3.0/debian/control	2018-04-07 20:51:40.000000000 +0000
+++ libcloud-2.3.0/debian/control	2018-08-27 12:52:47.000000000 +0000
@@ -31,7 +31,9 @@
                python3-pytest-runner
 Standards-Version: 4.1.4
 X-Python-Version: >= 2.6
-X-Python3-Version: >= 3.0
+# python 3.7 support not done yet, see
+# https://github.com/apache/libcloud/pull/1227#issuecomment-405817214
+X-Python3-Version: >= 3.0, <= 3.6
 Homepage: https://libcloud.apache.org/
 Vcs-Git: https://salsa.debian.org/python-team/modules/libcloud.git
 Vcs-Browser: https://salsa.debian.org/python-team/modules/libcloud