diff -Nru sope-5.0.1/debian/changelog sope-5.0.1/debian/changelog
--- sope-5.0.1/debian/changelog	2020-11-26 13:49:27.000000000 +0000
+++ sope-5.0.1/debian/changelog	2021-02-01 23:57:01.000000000 +0000
@@ -1,3 +1,11 @@
+sope (5.0.1-2) unstable; urgency=medium
+
+  * Build against OpenSSL, now that ftpmaster considers it a system
+    library. The GnuTLS codepath in SOGo is basically only used by
+    Debian/Ubuntu and is a source of many grave problems in SOGo.
+
+ -- Jordi Mallach <jordi@debian.org>  Tue, 02 Feb 2021 00:57:01 +0100
+
 sope (5.0.1-1) unstable; urgency=medium
 
   * New upstream release.
diff -Nru sope-5.0.1/debian/control sope-5.0.1/debian/control
--- sope-5.0.1/debian/control	2020-11-26 13:44:37.000000000 +0000
+++ sope-5.0.1/debian/control	2021-02-01 23:43:46.000000000 +0000
@@ -10,8 +10,8 @@
  libgnustep-base-dev,
  libxml2-dev,
  libldap2-dev,
- libgnutls28-dev,
  libpq-dev,
+ libssl-dev,
  default-libmysqlclient-dev,
  pkg-config,
  zlib1g-dev
diff -Nru sope-5.0.1/debian/rules sope-5.0.1/debian/rules
--- sope-5.0.1/debian/rules	2019-10-30 13:59:55.000000000 +0000
+++ sope-5.0.1/debian/rules	2021-02-01 23:44:00.000000000 +0000
@@ -14,7 +14,7 @@
 	dh_auto_clean
 
 override_dh_auto_configure:
-	./configure --disable-strip --with-gnustep --with-ssl=gnutls
+	./configure --disable-strip --with-gnustep --with-ssl=ssl
 
 override_dh_auto_build:
 	$(MAKE) all messages=yes OBJCFLAGS="$(CFLAGS)"