diff --git a/pkgs/by-name/ma/mattermost/package.nix b/pkgs/by-name/ma/mattermost/package.nix
index 11cfca7f6a8c..1efa00694488 100644
--- a/pkgs/by-name/ma/mattermost/package.nix
+++ b/pkgs/by-name/ma/mattermost/package.nix
@@ -20,9 +20,9 @@
     #
     # Ensure you also check ../mattermostLatest/package.nix.
     regex = "^v(10\\.11\\.[0-9]+)$";
-    version = "10.11.14";
-    srcHash = "sha256-rcKsfCJSot9mz8ds4LoIurF0NsgGQuuqhb9PRPjyxqU=";
-    vendorHash = "sha256-hKAKM2qFn5Zvr/Sc33XmFl7l59agMaEvlvVD5aOyaxI=";
+    version = "10.11.15";
+    srcHash = "sha256-b/hXZHYULl9nNJZT4GtKsaOfX8BEzz/v3Uy3EEbzN8U=";
+    vendorHash = "sha256-Z94d1eCIkuMG72Mlvk5su/99+4kJoaeHxaeZuk96Hlc=";
     npmDepsHash = "sha256-p9dq31qw0EZDQIl2ysKE38JgDyLA6XvSv+VtHuRh+8A=";
     lockfileOverlay = ''
       unlock(.; "@floating-ui/react"; "channels/node_modules/@floating-ui/react")