diff --git a/flake.lock b/flake.lock
index 9057177..de30a57 100644
--- a/flake.lock
+++ b/flake.lock
@@ -399,16 +399,16 @@
     "mattermost-server": {
       "flake": false,
       "locked": {
-        "lastModified": 1699283750,
-        "narHash": "sha256-gusJh1gODqEln/rcRRax1G7usCxA0bE2KTunKPUv7mM=",
+        "lastModified": 1699473143,
+        "narHash": "sha256-vJ5+ZiA7bOKvA2VMMIOkIEKz/XN/m/cQViJgKlyHUp0=",
         "owner": "mattermost",
         "repo": "mattermost-server",
-        "rev": "f8f79e13ef11d5bd2527d21a1967bd37f46a0fae",
+        "rev": "04849fd3c8705e64b6fe223716ff38f20a5b1e40",
         "type": "github"
       },
       "original": {
         "owner": "mattermost",
-        "ref": "v8.1.5",
+        "ref": "v8.1.6",
         "repo": "mattermost-server",
         "type": "github"
       }
@@ -416,14 +416,14 @@
     "mattermost-webapp": {
       "flake": false,
       "locked": {
-        "lastModified": 1699284661,
-        "narHash": "sha256-SCJ+2+69p19o+FnV7mKAF9Qd7OFFGKgdq7x0j5eCyuQ=",
+        "lastModified": 1699474045,
+        "narHash": "sha256-DTElm+9TnLoZz3ilQ9LK6E65OlrtSElkkOy56XT6+c0=",
         "type": "tarball",
-        "url": "https://releases.mattermost.com/8.1.5/mattermost-8.1.5-linux-amd64.tar.gz"
+        "url": "https://releases.mattermost.com/8.1.6/mattermost-8.1.6-linux-amd64.tar.gz"
       },
       "original": {
         "type": "tarball",
-        "url": "https://releases.mattermost.com/8.1.5/mattermost-8.1.5-linux-amd64.tar.gz"
+        "url": "https://releases.mattermost.com/8.1.6/mattermost-8.1.6-linux-amd64.tar.gz"
       }
     },
     "nix-darwin": {
@@ -538,11 +538,11 @@
         "waybar-iceportal": "waybar-iceportal"
       },
       "locked": {
-        "lastModified": 1699363198,
-        "narHash": "sha256-giPMxAg6HBs+QpEKhVsCTAOTadSZosX47cV9h8+65LE=",
+        "lastModified": 1699974682,
+        "narHash": "sha256-aGCoLN/kb04h09ErqMC+NV78miOW9eQrPDzINJneb8s=",
         "owner": "hexchen",
         "repo": "nixfiles",
-        "rev": "312e0733bc58ec876954da57d4f29ced4d85cfd6",
+        "rev": "5fffd53f78d8d9097d669604142ab4ab87bde62b",
         "type": "gitlab"
       },
       "original": {
@@ -617,16 +617,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1697723726,
-        "narHash": "sha256-SaTWPkI8a5xSHX/rrKzUe+/uVNy6zCGMXgoeMb7T9rg=",
+        "lastModified": 1699354722,
+        "narHash": "sha256-abmqUReg4PsyQSwv4d0zjcWpMHrd3IFJiTb2tZpfF04=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "7c9cc5a6e5d38010801741ac830a3f8fd667a7a0",
+        "rev": "cfbb29d76949ae53c457f152c52c173ea4bdd862",
         "type": "github"
       },
       "original": {
         "id": "nixpkgs",
-        "ref": "nixos-unstable",
+        "ref": "nixos-unstable-small",
         "type": "indirect"
       }
     },
@@ -678,11 +678,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1699291058,
-        "narHash": "sha256-5ggduoaAMPHUy4riL+OrlAZE14Kh7JWX4oLEs22ZqfU=",
+        "lastModified": 1699596684,
+        "narHash": "sha256-XSXP8zjBZJBVvpNb2WmY0eW8O2ce+sVyj1T0/iBRIvg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "41de143fda10e33be0f47eab2bfe08a50f234267",
+        "rev": "da4024d0ead5d7820f6bd15147d3fe2a0c0cec73",
         "type": "github"
       },
       "original": {
@@ -693,11 +693,11 @@
     },
     "nixpkgs_4": {
       "locked": {
-        "lastModified": 1699094435,
-        "narHash": "sha256-YLZ5/KKZ1PyLrm2MO8UxRe4H3M0/oaYqNhSlq6FDeeA=",
+        "lastModified": 1699374756,
+        "narHash": "sha256-X21OIoVcJejN9JKoLuoZSx3ZZkMh/iSpJ+GGrSNQyGU=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9d5d25bbfe8c0297ebe85324addcb5020ed1a454",
+        "rev": "9b92dad3804b543a8b5db878aabf7132d601fa91",
         "type": "github"
       },
       "original": {
@@ -904,11 +904,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1699311858,
-        "narHash": "sha256-W/sQrghPAn5J9d+9kMnHqi4NPVWVpy0V/qzQeZfS/dM=",
+        "lastModified": 1699951338,
+        "narHash": "sha256-1GeczM7XfgHcYGYiYNcdwSFu3E62vmh4d7mffWZvyzE=",
         "owner": "Mic92",
         "repo": "sops-nix",
-        "rev": "664187539871f63857bda2d498f452792457b998",
+        "rev": "0e3a94167dcd10a47b89141f35b2ff9e04b34c46",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 5e5a149..6bf8a5b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,9 +2,9 @@
   description = "hacc infra stuff";
 
   inputs = {
-    mattermost-webapp.url = "https://releases.mattermost.com/8.1.5/mattermost-8.1.5-linux-amd64.tar.gz";
+    mattermost-webapp.url = "https://releases.mattermost.com/8.1.6/mattermost-8.1.6-linux-amd64.tar.gz";
     mattermost-webapp.flake = false;
-    mattermost-server.url = "github:mattermost/mattermost-server?ref=v8.1.5";
+    mattermost-server.url = "github:mattermost/mattermost-server?ref=v8.1.6";
     mattermost-server.flake = false;
 
     nixpkgs.url = "nixpkgs/nixos-23.05";
diff --git a/pkgs/mattermost/default.nix b/pkgs/mattermost/default.nix
index 51e2cb5..bf9a938 100644
--- a/pkgs/mattermost/default.nix
+++ b/pkgs/mattermost/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, fetchFromGitHub, buildGoModule, buildEnv, lib, sources }:
 
 let
-  version = "8.1.5";
+  version = "8.1.6";
 
   mattermost-server = buildGoModule rec {
     pname = "mattermost-server";
@@ -9,7 +9,7 @@ let
 
     src = "${sources.mattermost-server}/server";
 
-    vendorSha256 = "sha256-bXZPs17F16W+TZ6JWFWt2KZpXHjFcIbgYhk2heWoYXA=";
+    vendorSha256 = "sha256-25nyneJ+ynM9WdnnLd4L3a720ecKdhJ1vyRG5lx2mgY=";
 
     subPackages = [ "cmd/mattermost" ];