diff --git a/src/config_generator/external_layer_utils.py b/src/config_generator/external_layer_utils.py
index ec80d41..a17adb6 100644
--- a/src/config_generator/external_layer_utils.py
+++ b/src/config_generator/external_layer_utils.py
@@ -6,6 +6,9 @@
 
 capabilites_cache = ExpiringDict()
 
+def clear_capabilities_cache():
+    global capabilites_cache
+    capabilites_cache.cache = {}
 
 def getChildElement(parent, path):
     for part in path.split("/"):
diff --git a/src/config_generator/map_viewer_config.py b/src/config_generator/map_viewer_config.py
index 4ccad96..5913e51 100644
--- a/src/config_generator/map_viewer_config.py
+++ b/src/config_generator/map_viewer_config.py
@@ -8,7 +8,7 @@
 import traceback
 import urllib.parse
 
-from .external_layer_utils import resolve_external_layer
+from .external_layer_utils import resolve_external_layer, clear_capabilities_cache
 from .permissions_query import PermissionsQuery
 from .service_config import ServiceConfig
 
@@ -89,6 +89,8 @@ def __init__(self, tenant_path, generator_config, themes_reader,
         """
         super().__init__('mapViewer', schema_url, service_config, logger)
 
+        clear_capabilities_cache()
+
         self.tenant_path = tenant_path
         self.themes_reader = themes_reader
         self.config_models = config_models