diff --git a/README.md b/README.md
index 91d36da0..9db75118 100644
--- a/README.md
+++ b/README.md
@@ -243,6 +243,7 @@ TeslaMate uses environment variables for runtime configuration.
 | DATABASE_PASS          | User password (**required**)                                                                                                                                                                                     | /                             |
 | DATABASE_NAME          | The database to connect to (**required**)                                                                                                                                                                        | /                             |
 | DATABASE_HOST          | Hostname of the database server (**required**)                                                                                                                                                                   | /                             |
+| DATABASE_PORT          | Port of the database server                                                                                                                                                                                      | 5432                          |
 | DATABASE_POOL_SIZE     | Size of the database connection pool                                                                                                                                                                             | 5                             |
 | TESLA_USERNAME         | Username / email of your Tesla account (**required**)                                                                                                                                                            | /                             |
 | TESLA_PASSWORD         | Password of your Tesla account (**required**)                                                                                                                                                                    | /                             |
diff --git a/config/releases.exs b/config/releases.exs
index 6afe5744..ea43a08c 100644
--- a/config/releases.exs
+++ b/config/releases.exs
@@ -13,6 +13,7 @@ config :teslamate, TeslaMate.Repo,
   password: System.fetch_env!("DATABASE_PASS"),
   database: System.fetch_env!("DATABASE_NAME"),
   hostname: System.fetch_env!("DATABASE_HOST"),
+  port: System.get_env("DATABASE_PORT", "5432"),
   pool_size: System.get_env("DATABASE_POOL_SIZE", "5") |> String.to_integer()
 
 config :teslamate, TeslaMateWeb.Endpoint,