diff --git a/src/config_generator/feature_info_service_config.py b/src/config_generator/feature_info_service_config.py
index 8cfc581..c5924ae 100644
--- a/src/config_generator/feature_info_service_config.py
+++ b/src/config_generator/feature_info_service_config.py
@@ -47,14 +47,9 @@ def config(self):
         config['service'] = 'feature-info'
 
         # additional service config
-        cfg_config = self.service_config.get('config', {})
-        if 'default_qgis_server_url' not in cfg_config:
-            # use default QGIS server URL from ConfigGenerator config
-            # if not set in service config
-            cfg_config['default_qgis_server_url'] = \
-                self.default_qgis_server_url
-
-        config['config'] = cfg_config
+        config['config'] = self.service_config.get('config', {})
+        # Use default_qgis_server_url from ConfigGenerator config if not explicitly set
+        config['default_qgis_server_url'] = config.get('default_qgis_server_url', self.default_qgis_server_url)
 
         resources = OrderedDict()
         config['resources'] = resources
diff --git a/src/config_generator/legend_service_config.py b/src/config_generator/legend_service_config.py
index 100a3a4..335506f 100644
--- a/src/config_generator/legend_service_config.py
+++ b/src/config_generator/legend_service_config.py
@@ -43,15 +43,9 @@ def config(self):
         config = super().config()
 
         # additional service config
-        cfg_config = self.service_config.get('config', {})
-        if 'default_qgis_server_url' not in cfg_config:
-            # use default QGIS server URL from ConfigGenerator config
-            # if not set in service config
-            cfg_config['default_qgis_server_url'] = \
-                self.default_qgis_server_url
-
-        self.legend_images_path = cfg_config['legend_images_path']
-        config['config'] = cfg_config
+        config['config'] = self.service_config.get('config', {})
+        # Use default_qgis_server_url from ConfigGenerator config if not explicitly set
+        config['default_qgis_server_url'] = config.get('default_qgis_server_url', self.default_qgis_server_url)
 
         resources = OrderedDict()
         config['resources'] = resources
diff --git a/src/config_generator/ogc_service_config.py b/src/config_generator/ogc_service_config.py
index 6892765..773e3d7 100644
--- a/src/config_generator/ogc_service_config.py
+++ b/src/config_generator/ogc_service_config.py
@@ -42,14 +42,9 @@ def config(self):
         config = super().config()
 
         # additional service config
-        cfg_config = self.service_config.get('config', {})
-        if 'default_qgis_server_url' not in cfg_config:
-            # use default QGIS server URL from ConfigGenerator config
-            # if not set in service config
-            cfg_config['default_qgis_server_url'] = \
-                self.default_qgis_server_url
-
-        config['config'] = cfg_config
+        config['config'] = self.service_config.get('config', {})
+        # Use default_qgis_server_url from ConfigGenerator config if not explicitly set
+        config['default_qgis_server_url'] = config.get('default_qgis_server_url', self.default_qgis_server_url)
 
         resources = OrderedDict()
         config['resources'] = resources