diff --git a/.gitignore b/.gitignore
index e2f0c6a70..efd77839a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -77,3 +77,5 @@ docker-compose.override.yml
 
 /.envrc
 /.direnv
+
+/config/master.key
diff --git a/flake.nix b/flake.nix
index d64988fc7..26ece812e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -15,7 +15,7 @@
           overlays = [
             (final: prev: {
               nodejs = prev.nodejs_20;
-              postgresql = prev.postgresql_15;
+              postgresql = prev.postgresql_16;
               ruby = (prev.ruby_3_3.withPackages (ps: with ps; [
                 psych
               ]));
diff --git a/run-services.sh b/run-services.sh
index f100537a8..ac60ba564 100755
--- a/run-services.sh
+++ b/run-services.sh
@@ -2,8 +2,8 @@
 
 set -e
 
-if ! pg_ctl -D ./postgres/15 status; then
-  pg_ctl -D ./postgres/15 -l ./postgres/postgresql.log start
+if ! pg_ctl -D ./postgres/16 status; then
+  pg_ctl -D ./postgres/16 -l ./postgres/postgresql.log start
 fi
 
 redis-server > ./redis/redis.log 2> ./redis/redis.err &
@@ -18,4 +18,4 @@ for pid in $(jobs -p); do
   kill -9 $pid
 done
 
-pg_ctl -D ./postgres/15 stop
+pg_ctl -D ./postgres/16 stop