diff --git a/config/hosts/matrix/postgresql.nix b/config/hosts/matrix/postgresql.nix
index 9cfdb46..a241efd 100644
--- a/config/hosts/matrix/postgresql.nix
+++ b/config/hosts/matrix/postgresql.nix
@@ -3,6 +3,7 @@
 {
   services.postgresql = {
     enable = true;
+    package = pkgs.postgresql_15;
     
     initialScript = pkgs.writeText "synapse-init.sql" ''
       CREATE ROLE "matrix-synapse" WITH LOGIN PASSWORD 'synapse';
@@ -14,33 +15,4 @@
 
     dataDir = "/mnt/data/postgresql/${config.services.postgresql.package.psqlSchema}";
   };
-
-  # Modified version of the script for upgrading PostgreSQL from here:
-  # https://nixos.org/manual/nixos/stable/#module-services-postgres-upgrading
-  environment.systemPackages = [
-    (let
-      newPostgres = pkgs.postgresql_15;
-    in pkgs.writeScriptBin "upgrade-pg-cluster" ''
-      set -eux
-
-      systemctl stop matrix-synapse.service
-      systemctl stop postgresql.service
-
-      export NEWDATA="/mnt/data/postgresql/${newPostgres.psqlSchema}"
-
-      export NEWBIN="${newPostgres}/bin"
-
-      export OLDDATA="${config.services.postgresql.dataDir}"
-      export OLDBIN="${config.services.postgresql.package}/bin"
-
-      install -d -m 0700 -o postgres -g postgres "$NEWDATA"
-      cd "$NEWDATA"
-      sudo -u postgres $NEWBIN/initdb -D "$NEWDATA"
-
-      sudo -u postgres $NEWBIN/pg_upgrade \
-        --old-datadir "$OLDDATA" --new-datadir "$NEWDATA" \
-        --old-bindir $OLDBIN --new-bindir $NEWBIN \
-        "$@"
-    '')
-  ];
 }