diff --git a/nixos/tests/matrix/synapse.nix b/nixos/tests/matrix/synapse.nix
index 323fa25ccb6c9d..4b9ade875a7832 100644
--- a/nixos/tests/matrix/synapse.nix
+++ b/nixos/tests/matrix/synapse.nix
@@ -187,8 +187,6 @@ in
           networksStyle = "subnet";
           enableSubmission = true;
           tlsTrustedAuthorities = "${mailerCerts.ca.cert}";
-          sslCert = "${mailerCerts.${mailerDomain}.cert}";
-          sslKey = "${mailerCerts.${mailerDomain}.key}";
 
           # blackhole transport
           transport = "example.com discard:silently";
@@ -205,6 +203,14 @@ in
             smtp_tls_protocols = "TLSv1.3, TLSv1.2, !TLSv1.1, !TLSv1, !SSLv2, !SSLv3";
             smtpd_tls_mandatory_protocols = "TLSv1.3, TLSv1.2, !TLSv1.1, !TLSv1, !SSLv2, !SSLv3";
             smtp_tls_mandatory_protocols = "TLSv1.3, TLSv1.2, !TLSv1.1, !TLSv1, !SSLv2, !SSLv3";
+            smtp_tls_chain_files = [
+              "${mailerCerts.${mailerDomain}.key}"
+              "${mailerCerts.${mailerDomain}.cert}"
+            ];
+            smtpd_tls_chain_files = [
+              "${mailerCerts.${mailerDomain}.key}"
+              "${mailerCerts.${mailerDomain}.cert}"
+            ];
           };
         };
       };
diff --git a/pkgs/by-name/ma/matrix-synapse-unwrapped/package.nix b/pkgs/by-name/ma/matrix-synapse-unwrapped/package.nix
index 69acde9bad8c12..2b0914ba526f85 100644
--- a/pkgs/by-name/ma/matrix-synapse-unwrapped/package.nix
+++ b/pkgs/by-name/ma/matrix-synapse-unwrapped/package.nix
@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch,
   python3,
   openssl,
   libiconv,
@@ -17,16 +18,25 @@ let
 in
 python3.pkgs.buildPythonApplication rec {
   pname = "matrix-synapse";
-  version = "1.131.0";
+  version = "1.132.0";
   format = "pyproject";
 
   src = fetchFromGitHub {
     owner = "element-hq";
     repo = "synapse";
     rev = "v${version}";
-    hash = "sha256-nXDVkuV5GCk0Lp4LfyiModKdO30PJ40B5mXdm5tMHQo=";
+    hash = "sha256-yKoBYwd2djHAawBJRcbdrJH16+MHpYQnU7h39SvWqYE=";
   };
 
+  patches = [
+    # Skip broken HTML preview test case with libxml >= 2.14
+    # https://github.com/element-hq/synapse/pull/18413
+    (fetchpatch {
+      url = "https://github.com/element-hq/synapse/commit/8aad32965888476b4660bf8228d2d2aa9ccc848b.patch";
+      hash = "sha256-EUEbF442nOAybMI8EL6Ee0ib3JqSlQQ04f5Az3quKko=";
+    })
+  ];
+
   cargoDeps = rustPlatform.fetchCargoVendor {
     inherit pname version src;
     hash = "sha256-9VJnn8aPkShqK2wYGFr+S5koIjma7VOr+LkLXwStL1E=";