diff --git a/nix/sources.json b/nix/sources.json
index 92e8820..b2469c7 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -18,15 +18,16 @@
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "mattermost-server": {
+        "branch": "master",
         "description": "Open source Slack-alternative in Golang and React - Mattermost",
         "homepage": "https://mattermost.com",
         "owner": "mattermost",
         "repo": "mattermost-server",
-        "rev": "f46b068ecf3b20a0d6e529618813e0ef6b85ed72",
+        "rev": "304d655bb3966cb91d9f1793137328d128344f06",
         "sha256": "1k0jn3a9nafbhvwn0d0rc2pj80mx7iz2scjbqkz96c5yzw3lyj79",
         "type": "tarball",
-        "url": "https://github.com/mattermost/mattermost-server/archive/f46b068ecf3b20a0d6e529618813e0ef6b85ed72.tar.gz",
-        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz",
+        "url": "https://github.com/mattermost/mattermost-server/archive/refs/tags/v5.37.0.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/refs/tags/v<version>.tar.gz",
         "version": "5.37.0"
     },
     "mattermost-webapp": {