diff --git a/docker-compose.yml b/docker-compose.yml
index 506c2a7..b61c9ce 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,9 +3,11 @@ version: '3'
 services:
   db:
     image: postgres:13
+    command: -c config_file=/etc/postgresql/postgresql.conf
     env_file:
       - docker.env
     volumes:
+      - ./etc/postgresql/postgresql.conf:/etc/postgresql/postgresql.conf
       - db_data:/var/lib/postgresql/data/
 
   web:
diff --git a/etc/postgresql/postgresql.conf b/etc/postgresql/postgresql.conf
new file mode 100644
index 0000000..2bf294d
--- /dev/null
+++ b/etc/postgresql/postgresql.conf
@@ -0,0 +1,8 @@
+# Default postgresql.conf
+
+listen_addresses = '*'
+max_connections = 100
+shared_buffers = 128MB
+dynamic_shared_memory_type = posix
+max_wal_size = 1GB
+min_wal_size = 80MB