diff --git a/pkgs/mattermost.nix b/pkgs/mattermost.nix
index 90a9fce..f4b387c 100644
--- a/pkgs/mattermost.nix
+++ b/pkgs/mattermost.nix
@@ -12,13 +12,13 @@ buildGoModule rec {
   # See https://docs.mattermost.com/upgrade/extended-support-release.html
   # When a new ESR version is available (e.g. 8.1.x -> 9.5.x), update
   # the version regex in passthru.updateScript as well.
-  version = "9.5.8";
+  version = "9.11.0";
 
   src = fetchFromGitHub {
     owner = "mattermost";
     repo = "mattermost";
     rev = "v${version}";
-    hash = "sha256-WK3O1t2mMqftH8EB12g1/xzQnnmJxSsBjaGrRk0Hypw=";
+    hash = "sha256-Qs5/f2wltG7HRTOVxfS+6C9CP+NR475ix/4XHezKxIc=";
   };
 
   # Needed because buildGoModule does not support go workspaces yet.
@@ -34,10 +34,10 @@ buildGoModule rec {
 
   webapp = fetchurl {
     url = "https://releases.mattermost.com/${version}/mattermost-${version}-linux-amd64.tar.gz";
-    hash = "sha256-gUp/Y0hI3oZkyTnEvyNXtHtPx77MC5zz+Z4b0FdrsqM=";
+    hash = "sha256-KT8hYVhjAvSluqnZ2IGX9RdCb8EqLtIyQuIKJkf+9No=";
   };
 
-  vendorHash = "sha256-TJCtgNf56A1U0EbV5gXjTro+YudVBRWiSZoBC3nJxnE=";
+  vendorHash = "sha256-0rxLt2ODlGsC3z5qw7m7QsverKrTtWicnHep4+fDD3M=";
 
   modRoot = "./server";
   preBuild = ''
@@ -70,7 +70,7 @@ buildGoModule rec {
 
   passthru = {
     updateScript = nix-update-script {
-      extraArgs = [ "--version-regex" "^v(9\.5\.([0-9.]+))" ];
+      extraArgs = [ "--version-regex" "^v(9\.11\.([0-9.]+))" ];
     };
     tests.mattermost = nixosTests.mattermost;
   };