diff -Nru zurl-1.7.1/debian/changelog zurl-1.7.1/debian/changelog
--- zurl-1.7.1/debian/changelog	2016-11-17 16:32:09.000000000 +0000
+++ zurl-1.7.1/debian/changelog	2017-01-11 08:08:10.000000000 +0000
@@ -1,3 +1,28 @@
+zurl (1.7.1-4) unstable; urgency=medium
+
+  * Build-depend on libssl1.0-dev | libssl-dev (<< 1.1) and
+    depend on libcurl3 (>> 7.51.0-1). (Closes: Bug#850881)
+    The release team asked to revert the switch to OpenSSL 1.1
+    for curl, and for packages depending on curl.
+    The dependency on libcurl3 (>> 7.51.0-1) should make sure
+    that the downgraded packages of both curl and zurl propagate
+    to testing at the same time.
+
+ -- Jan Niehusmann <jan@debian.org>  Wed, 11 Jan 2017 09:08:10 +0100
+
+zurl (1.7.1-3) unstable; urgency=critical
+
+  * Update Vcs-Browser URL
+  * Build-depend on libssl-dev (>= 1.1) and depend on libcurl3 (>= 7.51.0).
+    This fixes broken SSL support caused by an API incompatible change
+    without SONAME change in libcurl3. (See #844018).
+    Because curl 7.51.0-1 migrated to testing even though
+    there was a new RC bug stating that it breaks other packages, zurl
+    must be built with OpenSSL 1.1 as well.
+  * Set urgency to critical because 1.7.1-2 gets broken by libcurl 7.51.0.
+
+ -- Jan Niehusmann <jan@debian.org>  Sun, 01 Jan 2017 19:27:07 +0100
+
 zurl (1.7.1-2) unstable; urgency=medium
 
   * Fix build on GNU Hurd.
diff -Nru zurl-1.7.1/debian/control zurl-1.7.1/debian/control
--- zurl-1.7.1/debian/control	2016-11-17 16:32:09.000000000 +0000
+++ zurl-1.7.1/debian/control	2017-01-11 08:08:10.000000000 +0000
@@ -2,15 +2,15 @@
 Section: net
 Priority: extra
 Maintainer: Jan Niehusmann <jan@debian.org>
-Build-Depends: debhelper (>= 9.0.0), qtbase5-dev, qt5-qmake, qtchooser, libzmq3-dev (>= 2.0), pkg-config, libcurl4-openssl-dev, libssl1.0-dev
+Build-Depends: debhelper (>= 9.0.0), qtbase5-dev, qt5-qmake, qtchooser, libzmq3-dev (>= 2.0), pkg-config, libcurl4-openssl-dev, libssl1.0-dev | libssl-dev (<< 1.1)
 Standards-Version: 3.9.8
 Homepage: https://github.com/fanout/zurl/
 Vcs-Git: git://anonscm.debian.org/users/jan/zurl.git
-Vcs-Browser: http://anonscm.debian.org/gitweb/?p=users/jan/zurl.git;a=summary
+Vcs-Browser: https://anonscm.debian.org/cgit/users/jan/zurl.git
 
 Package: zurl
 Architecture: any
-Depends: ${shlibs:Depends}, ${misc:Depends}, adduser, lsb-base (>= 3.0-6)
+Depends: ${shlibs:Depends}, ${misc:Depends}, adduser, lsb-base (>= 3.0-6), libcurl3 (>> 7.51.0-1)
 Description: HTTP client worker with ZeroMQ interface
  This service allows one to trigger HTTP requests and to retrieve
  the responses via ZeroMQ.