diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3a7a803..aeacbd2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 * ENHANCEMENT
   * better error handling in entrypoint script
+  * add env variable for custom DB port
 
 * BUGFIX
   * symling `/etc/ssl/certs/ca-certificates.crt` to freshrss root as workaround for [#2549](https://github.com/FreshRSS/FreshRSS/issues/2549)
diff --git a/README.md b/README.md
index bd786e4..b772774 100644
--- a/README.md
+++ b/README.md
@@ -95,6 +95,7 @@ FRESHRSS_CURLOPT_PROXYAUTH=
 FRESHRSS_CURLOPT_PROXYUSERPWD=
 FRESHRSS_DB_TYPE="sqlite"
 FRESHRSS_DB_HOST="localhost"
+FRESHRSS_DB_PORT=
 FRESHRSS_DB_USER=
 FRESHRSS_DB_PASSWORD=
 FRESHRSS_DB_BASE=
diff --git a/overlay/etc/templates/config.php.tmpl b/overlay/etc/templates/config.php.tmpl
index d0c8ec6..46fdc6e 100644
--- a/overlay/etc/templates/config.php.tmpl
+++ b/overlay/etc/templates/config.php.tmpl
@@ -55,6 +55,7 @@ return array(
     'db' => array(
         'type' => '{{ getenv "FRESHRSS_DB_TYPE" "sqlite" }}',
         'host' => '{{ getenv "FRESHRSS_DB_HOST" "localhost" }}',
+        'port' => '{{ getenv "FRESHRSS_DB_PORT" }}'
         'user' => '{{ getenv "FRESHRSS_DB_USER" }}',
         'password' => '{{ getenv "FRESHRSS_DB_PASSWORD" }}',
         'base' => '{{ getenv "FRESHRSS_DB_BASE" }}',