diff --git a/lib-php/website/status.php b/lib-php/website/status.php
index 9f030fb3..3bb2ffa1 100644
--- a/lib-php/website/status.php
+++ b/lib-php/website/status.php
@@ -37,7 +37,8 @@ if ($sOutputFormat == 'json') {
     $aResponse = array(
                   'status' => 0,
                   'message' => 'OK',
-                  'data_updated' => (new DateTime('@'.$epoch))->format(DateTime::RFC3339)
+                  'data_updated' => (new DateTime('@'.$epoch))->format(DateTime::RFC3339),
+                  'software_version' => CONST_NominatimVersion
                  );
     javascript_renderData($aResponse);
 } else {
diff --git a/nominatim/tools/refresh.py b/nominatim/tools/refresh.py
index b59c37bf..5cfa1ab0 100644
--- a/nominatim/tools/refresh.py
+++ b/nominatim/tools/refresh.py
@@ -9,6 +9,7 @@ from textwrap import dedent
 from psycopg2.extras import execute_values
 
 from ..db.utils import execute_file
+from ..version import NOMINATIM_VERSION
 
 LOG = logging.getLogger()
 
@@ -258,9 +259,10 @@ def setup_website(basedir, phplib_dir, config):
                       <?php
 
                       @define('CONST_Debug', $_GET['debug'] ?? false);
-                      @define('CONST_LibDir', '{}');
+                      @define('CONST_LibDir', '{0}');
+                      @define('CONST_NominatimVersion', '{1[0]}.{1[1]}.{1[2]}-{1[3]}');
 
-                      """.format(phplib_dir))
+                      """.format(phplib_dir, NOMINATIM_VERSION))
 
     for php_name, conf_name, var_type in PHP_CONST_DEFS:
         if var_type == bool: