diff --git a/flake.lock b/flake.lock
index 2574e25..a97896b 100644
--- a/flake.lock
+++ b/flake.lock
@@ -23,11 +23,11 @@
         "utils": "utils"
       },
       "locked": {
-        "lastModified": 1708091384,
-        "narHash": "sha256-dTGGw2y8wvfjr+J9CjQbfdulOq72hUG17HXVNxpH1yE=",
+        "lastModified": 1715699772,
+        "narHash": "sha256-sKhqIgucN5sI/7UQgBwsonzR4fONjfMr9OcHK/vPits=",
         "owner": "serokell",
         "repo": "deploy-rs",
-        "rev": "0a0187794ac7f7a1e62cda3dabf8dc041f868790",
+        "rev": "b3ea6f333f9057b77efd9091119ba67089399ced",
         "type": "github"
       },
       "original": {
@@ -73,11 +73,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1709504473,
-        "narHash": "sha256-hXzXxaZaI9Pn5tO4otY2gJUvW/orDGDAMdstm3AY8RU=",
+        "lastModified": 1712623723,
+        "narHash": "sha256-jPD5+M+QPyMRk52zfFMIeHdv7yXYJ/yNGqwS0PhYF+E=",
         "owner": "reckenrode",
         "repo": "nix-foundryvtt",
-        "rev": "5cf4e6d9ed7b662dbea7a61d785b67a878598986",
+        "rev": "6025615b431170558c3c13f16b549fc0126425e1",
         "type": "github"
       },
       "original": {
@@ -134,11 +134,11 @@
     },
     "nixpkgs-stable": {
       "locked": {
-        "lastModified": 1710033658,
-        "narHash": "sha256-yiZiVKP5Ya813iYLho2+CcFuuHpaqKc/CoxOlANKcqM=",
+        "lastModified": 1716061101,
+        "narHash": "sha256-H0eCta7ahEgloGIwE/ihkyGstOGu+kQwAiHvwVoXaA0=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b17375d3bb7c79ffc52f3538028b2ec06eb79ef8",
+        "rev": "e7cc61784ddf51c81487637b3031a6dd2d6673a2",
         "type": "github"
       },
       "original": {
@@ -150,11 +150,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1709961763,
-        "narHash": "sha256-6H95HGJHhEZtyYA3rIQpvamMKAGoa8Yh2rFV29QnuGw=",
+        "lastModified": 1716330097,
+        "narHash": "sha256-8BO3B7e3BiyIDsaKA0tY8O88rClYRTjvAp66y+VBUeU=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "3030f185ba6a4bf4f18b87f345f104e6a6961f34",
+        "rev": "5710852ba686cc1fd0d3b8e22b3117d43ba374c2",
         "type": "github"
       },
       "original": {
@@ -182,11 +182,11 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1710021367,
-        "narHash": "sha256-FuMVdWqXMT38u1lcySYyv93A7B8wU0EGzUr4t4jQu8g=",
+        "lastModified": 1716361217,
+        "narHash": "sha256-mzZDr00WUiUXVm1ujBVv6A0qRd8okaITyUp4ezYRgc4=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "b94a96839afcc56de3551aa7472b8d9a3e77e05d",
+        "rev": "46397778ef1f73414b03ed553a3368f0e7e33c2f",
         "type": "github"
       },
       "original": {
@@ -253,11 +253,11 @@
         "nixpkgs-stable": "nixpkgs-stable"
       },
       "locked": {
-        "lastModified": 1710195194,
-        "narHash": "sha256-KFxCJp0T6TJOz1IOKlpRdpsCr9xsvlVuWY/VCiAFnTE=",
+        "lastModified": 1716400300,
+        "narHash": "sha256-0lMkIk9h3AzOHs1dCL9RXvvN4PM8VBKb+cyGsqOKa4c=",
         "owner": "Mic92",
         "repo": "sops-nix",
-        "rev": "e52d8117b330f690382f1d16d81ae43daeb4b880",
+        "rev": "b549832718b8946e875c016a4785d204fcfc2e53",
         "type": "github"
       },
       "original": {
diff --git a/modules/roundcube.nix b/modules/roundcube.nix
index 4ea637a..eec62eb 100644
--- a/modules/roundcube.nix
+++ b/modules/roundcube.nix
@@ -17,6 +17,9 @@ in {
       };
     };
 
+    # Required because roundcube uses psql: https://github.com/NixOS/nixpkgs/blob/46397778ef1f73414b03ed553a3368f0e7e33c2f/nixos/modules/services/mail/roundcube.nix#L247
+    services.postgresql.package = pkgs.postgresql_15;
+
     services.roundcube = {
       enable = true;
       plugins = [ "managesieve" ];